Answer:
The first trophic level
Explanation:
The most important trophic level in the ecosystem is the the first trophic level. This trophic level is dominated by the plants the furnishes the ecosystem with food.
The ecosystem is made up of living and non - living components. To being with, the trophic levels are the feeding levels which corresponds with the energy levels. Now, the most important of all is the first trophic level It is made up of plants which are called producers. They use inorganic matter to produce food for the whole ecosystem. This food is the source of energy for all living activities in the system.Cellular respiration is an exothermic reaction and photosynthesis is an endothermic reaction. How does the required activation energy compare for these two reactions?.
The required activation energy compare for the two reactions is that (D) Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
Chlorophyll absorbs energy from light (photons/quanta) to create ATP molecules in the process of photosynthesis, which is primarily an intricate endothermic mechanism. Both the creation of glucose and oxygen is aided by them.
In contrast to photosynthesis, respiration takes place in specialized organelles called mitochondria and is an exothermic activity. Numerous enzymes break down glucose in this step to generate energy that is then combined with ATP Synthase to create ATP molecules.
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Question correction:
Cellular respiration is an exothermic reaction and photosynthesis is an endothermic reaction. How does the required activation energy compare for these two reactions?
A. Photosynthesis needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
B. Cellular respiration needs a higher amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
C. Photosynthesis needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
D. Cellular respiration needs a smaller amount of energy to activate the reaction because the products are at a lower energy state than the reactants.
A Ornithologist is a bird expert.
How many moles of liquid iron will be produced from 1.08 moles of iron (III) oxide, Fe2O3?
monogamous behavior is characteristic of which of these primate species? a. chimpanzee b. orangutan c. gibbon d. baboon
Monogamous behavior is characteristic of the primate species: (c) gibbon.
Monogamous behavior is where a single male and a single female mate only with each other. They do not have multiple partners. This behavior is observed between organisms within the same species. This behavior is observed in swans, birds, gibbons, bats, etc.
Primate is an order of the class Mammalia. They are characterized by larger brains, slow growth, long lifespan and few number of offspring. Primate possesses the most intellectual organisms. Their hands are meant for grasping and have great extent of movement in their shoulders. The examples are: humans, apes, lorises, etc.
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which characteristic helps distinguishes deuterostomes from protostomes? group of answer choices embryological origin of the mouth from blastopore ability to form a blastopore mesodermal migration ectodermal appendages
The characteristic that helps distinguish deuterostomes from protostomes is (a) embryological origin of the mouth from blastopore.
Deuterostomes are the organisms in which the mouth develops from the opening other than the blastopore (the first opening). In deuterostomes the anus forms from the blastopore. The example of deuterostomes is: vertebrates (and thus humans), sea stars, and crinoids.
Protostomes are the organisms in which the mouth develops from the blastopore. Their anus is formed after the formation of mouth. Examples are: arthropods, molluscs, annelids, flatworms and nematodes. Both protostomes and deuterostomes have a common ancestor called Ediacaran, a worm-like aquatic animal.
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which of the following is most closely related to the unique density patterns of water described?
Answer: Actually, the exact density of water is not really 1 g/ml, but rather a bit less (very, very little less), at 0.9998395 g/ml at 4.0° Celsius (39.2° Fahrenheit).
Explanation: Its hydrogen bonding causes its many unique properties, such as having a solid form less dense than its liquid form, a relatively high boiling point of 100 °C for its molar mass, and a high heat capacity. is a constant, so their respective concentrations are inversely proportional to each other.
Actually, at 4.0 degrees Celsius (39.2 degrees Fahrenheit), water has a density of 0.9998395 g/ml, which is very, very slightly less than 1 g/ml. Its numerous distinctive characteristics.
What is Density patterns?A solid form that is less dense than its liquid form, a comparatively high boiling point of 100 °C for its molar mass, and a high heat capacity, are all brought about by its hydrogen bonding.
The density equation is straightforward: Take the mass of an item with uniformly distributed material.
A substance's density is a measurement of how heavy it is in relation to its size. When placed in water, an object will float if its density is lower than that of the water, whereas it will sink if its density is higher. The density of a material is a distinguishing quality that is independent of the substance's volume.
Therefore, Actually, at 4.0 degrees Celsius (39.2 degrees Fahrenheit), water has a density of 0.9998395 g/ml, which is very, very slightly less than 1 g/ml. Its numerous distinctive characteristics.
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the autonomic (involuntary) nervous system controls the rate at which the heartbeats. sympathetic (fight or flight) signals speed up the heart’s rate while parasympathetic (rest and digest) signals slow it down. with which part or parts of the heart do you think sympathetic and parasympathetic neurons form synapses? explain your reasoning.
the autonomic (involuntary) nervous system controls the rate at which the heartbeats. sympathetic (fight or flight) signals speed up the heart’s rate while parasympathetic (rest and digest) signals slow it down. The part or parts of the heart that forms sympathetic and parasympathetic neurons form synapses is called cardiac plexus.
Cardiac plexus is a plexus of the nerves that are present at the base of the heart and is divided into superficial and deep part. The sympathetic and the parasympathetic nerves form synapses with heart in the form of cardiac plexus.
The sympathetic nerves are responsible for activating flight or fight mode while parasympathetic nerves are responsible for restoring the normal body state.
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research with split-brain patients led michael gazzaniga to conclude that the typically constructs the theories people offer to explain their own behaviors. please choose the correct answer from the following choices, and then select the submit answer button. answer choices somatic nervous system left cerebral hemisphere right cerebral hemisphere autonomic nervous system
Left cerebral hemisphere
Michael Gazzaniga and Roger Sperry carried out the Split-Brain investigation. When Sperry and Ronald Myers discovered that each hemisphere functioned independently as if it were a full brain after the two hemispheres were excised, this discovery served as the impetus for the investigation (Gazzaniga). Prior to doing the study, the researchers' knowledge of the subject was based on Sperry and Myers' discovery, findings from studies of animals, and accounts of people who had had "brain-splitting" surgery. The goal of the study was to see if, in individuals with epilepsy who had had surgery, the hemispheres could function independently of one another when they were divided.
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the loss of tooth substance by a chemical process that does not involve known bacterial action is known as: group of answer choices erosion. attrition. bruxism. enamel hyperplasia.
The correct answer is Option A) Erosion.
When there is a loss of tooth substance due to a chemical process that does not involve bacterial action it is known as erosion.
What is erosion of teeth?Dental erosion or tooth erosion is the chemical loss of mineralized tooth substances which is caused due to exposure to acids which is not derived from oral bacteria.
There are two ways of fixing tooth erosion:
Tooth Bonding: In the milder cases of enamel erosion, bonding can be used. Here, it is a cosmetic procedure and a resin which matches the teeth is applied to the damaged tooth. It is later polished and trimmed to fit the mouth.Tooth Crowns: In severe cases of dental erosion, dental crowns are preferred. It involves capping the tooth with a new one in order to protect the damaged teeth.To know more about dental erosion, visit:
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donoghue pcj, purnell ma. genome duplication, extinction and vertebrate evolution. trends ecol evol. 2005;20:312–9.
Vertebrate evolution has been punctuated by way of three episodes of huge gene or genome duplication, which have been linked with the foundation of vertebrates, gnathostomes and teleosts, respectively. These three events coincide with bursts of character acquisition and increases in phenotypic complexity, and many researchers have recommended a causal relationship between the two. However, this pattern is derived from statistics for residing taxa only; we argue here that, when fossils are taken into account, bursts of character acquisition disappear and gen(om)e duplication in vertebrate phylogeny can no longer be correlated with the foundation of physique plans. If patterns of persona acquisition or morphological gaps between greater taxa are a reflection of phenotypic complexity, then extra inclusive statistics units incorporating fossil taxa provide no assist for hypotheses linking gen(om)e duplications and the evolution of complexity in vertebrates.
Vertebrates are animals that possess a vertebral column and/or notochord at any factor in their lives.” One of the methods existence is classified is thru the presence or absence of the vertebrate. Vertebrates and invertebrates developed from a common ancestor that was speculated to have lived around 600 million years ago.
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matthew j. everly. cardiac transplantation in the united states: an analysis of the unos registry. clinical trans- plants, pages 35–43, 2008.
Cardiac transplantation in the united states: an analysis of the UNOs registry is a research paper by Matthew J. Everly.
What is the abstract?For people with advanced heart disease, cardiac transplantation is a crucial choice. The number of heart transplants carried out annually in the US is around 2,000. Due to a shortage of contributors, this figure has stayed fairly steady. Coronary artery disease and dilated cardiomyopathy were the two main causes of cardiac transplants prior to the last 20 years, however dilated cardiomyopathy has since replaced coronary artery disease as the leading factor.
With the introduction of more recent immunosuppressive drugs, survival rates have increased (tacrolimus and mycophenolate). For 43,906 heart transplants, the median survival time was around 9 years. The survival rate was still declining at 20 years, reaching only 10%. Seven-year survival rates were 59%, 62%, and 65%, respectively, for patients who received heart transplants between 1998 and 1994, 1995 and 2000, and 2000 and 2007.
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Which best expresses a theme of “Church”
1.Many religions speak of peace but support war.
2.Kindness is a major principle of religion.
3.People become religious for their own personal gain.
4.Religion brings peace into people’s lives.
The correct option should be Religion brings peace into people’s lives; option 4
What is religion?
Religion is a set of organized beliefs, practices, and systems that most often relate to the belief and worship of a controlling force.
Many people have differing views about religion and its impact on the society.
Religion in its purest form was designed to bring peace into people’s lives.
The major religions of the world are:
Christianity IslamBuddhismHinduismChristians follow the teachings of Jesus Christ and worship in a Church.
The main teaching in Churches are centred on peace and harmony in people's lives.
Therefore, religion is meant to bring peace in people' s lives.
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In humans, mitochondrial genetic disorders are inherited from only the mother. The severity of such diseases can vary greatly, even within a single family. What form of inheritance does this represent?.
The form of inheritance represented by mitochondrial genetic disorders is cytoplasmic inheritance.
The cell contains several cell organelles like mitochondria, chloroplast, Golgi apparatus, endoplasmic reticulum, etc.
Among the organelles present inside the cell, mitochondria and chloroplast are the two organelles that contain their own DNA.
During fertilization, the fusion of sperm and the ovum takes place to form the zygote.
The majority of the cytoplasm present inside the zygote is from the maternal cytoplasm i.e., the ovum. The paternal contribution to the zygote’s cytoplasm is negligible.
Therefore, if any disorder occurs in the maternal mitochondrial DNA, it will get inherited by the offspring.
As the mitochondria are present in the cytoplasm of the cell, the inheritance of mitochondrial traits is known as cytoplasmic inheritance.
Hence, the form of inheritance represented by mitochondrial genetic disorders is cytoplasmic inheritance.
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Are we as individuals, a country or the world able to live sustainable ?
Answer:
Researchers broke down sustainable development into categories such as carbon dioxide emissions and use of natural resources like nitrogen, phosphorus and clean water. Bad news, Earthlings: It may be possible for everyone on the planet to live a “good” life.
Explanation:
Sustainability improves the quality of our lives, protects our ecosystem and preserves natural resources for future generations.
Sustainable living means understanding how our lifestyle choices impact the world around us and finding ways for everyone to live better and lighter. Applying a 'people lens' to sustainability is new, timely and opportunities are great.
in trying to determine whether a fossil is a human ancestor, we should always look for traits that make us human today.
Trying to determine whether a fossil is a human ancestor, we should always look for skeleton or bone that make us human today.
What is bone?Bone is a connective tissue which is metabolically active and the main function of bone is to provide mechanical or structural support as well as perform movement, and protect important organs of the body.
The bone is made up of bone cells known as osteocytes and extracellular matrix. The total number of bone human body contain is 206 bones including bones of spine, legs, arms, ribs, and skull.
Bones are made up of calcium and carbonate and they have bone marrow in which blood cells are produced. By nature bones came in category of living and they are active tissue .
There are several types of bones such as flat bones, short bones, sesamoid bones, and long bones. The function of bone is to protect vital organs of the body.
Therefore, trying to determine whether a fossil is a human ancestor, we should always look for skeleton or bone that make us human today.
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Define kinesiology and list seven types of science it encompasses
Answer:
Kinesiology is the study of human or non-human body movement. The seven types of sciences it encompasses are physiology, anatomy, biomechanics, psychology, sociology, motor learning and sports pedagogy.
which of the following represents the highest structural level in the elephant body?
a-the muscular tissue
b-the stomach
c-the nervous system
d-the foot
Elephants walk on their toes, distributing their body weight equally over the fatty/connective tissue near the heel, tilted foot shape. Thus, option D is correct.
What is the highest structural level in the elephant?Elephant feet have an inclined bone and a thick pad of fat and connective tissue near the heel.
Elephants walk on their toes, distributing their body weight equally over the fatty/connective tissue near the heel to the tilted foot shape having. The highest structural level in the elephant body.
For instance, a 2.88 m tall, 4,167 kg adult male Asian elephant distributes just 3.8 kg (8.38 lb) of weight per square inch on its heels.
Elephants can move safely over uneven terrain and muddy ground thanks to their unusual foot anatomy.
Therefore, the foot represents the highest structural level in the elephant body.
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each of the main types of biological macromolecules (proteins, nucleic acids, carbohydrates, and lipids) are polymers of specific types of monomers.
Each of the main types of biological macromolecules is polymers of specific types of monomers. It is a correct statement.
What are biomolecules?Biomolecules usually referred to as biological molecules, are among the various compounds made by organisms that live on carbohydrates. These biomolecules come in a plethora of shapes and sizes. They also carry out a variety of tasks. Lipids, carbohydrates, proteins, and nucleic acids are the four main categories of biomolecules.
Nucleic acids form acids from the genetic material of the organisms. Carbohydrates and fats are used for the synthesis of energy. Proteins are used for structural and functional roles in the body.Therefore, this is a correct statement.
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Structured questions
In an experiment on the action of the enzyme amylase, equal volumes of enzyme and starch
solution were mixed. The quantity of maltose (product) was measured during two separate
experiments, one at 18 °C, the other at 25 °C. The results are shown in the graph below.
1.
a.
b.
C.
quantity of maltose produced
(arbitrary unit)
12.
10-
8.
0 2 4
6
25 °C
18 °C
8 10 12 14 16 18
time (min)
Explain why the quantity of maltose produced eventually levelled off at both
temperatures.
[1 mark]
Explain why, at 4th minute time, more maltose had been produced at 25 °C than at 18 °C.
[4 marks]
In terms of the properties of enzyme, explain why amylase is the only enzyme that breaks
down starch.
[1 mark]
1) The levelling is due to the attainment of saturation point
2) The production of more maltose show that 25 °C is the optimum temperature of the enzyme.
What is an enzyme?An enzyme is a biological catalyst that see to the speeding up of the chemical reactions that occur in the body. Recall that an enzyme must be specific in its action. This implies that no two enzymes are able to catalyze the same reaction. The owes largely to the fact that the enzyme fits with the substrate in a lock and key model.
Let us recall that us recall that an enzyme does have an optimum temperature at which it functions, At the optimum temperature of the enzyme, the productivity of the enzyme is highest.
It then follows that;
1) The enzymes level off in the both curves because it has reached the saturation point.
2) The at 4th minute time, more maltose had been produced at 25 °C than at 18 °C because 25 °C is the optimum operating temperature of maltose
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Brainless to the best answer.
Are meteorites renewable? If so in what way?
What type of plants contain tubes that help transport water and nutrients into their other parts?
Note: Im in 6th grade
Plants like ferns and conifers have xylem “straws” that are made of slender cells called tracheids. At maturity these cells die, leaving behind a rigid cell wall scaffolding tube to conduct water and minerals.
describe how you can test for the presence of oxygen in the air
Answer:
Explanation:
Oxygen. Oxygen supports combustion . If oxygen is present in a test tube, a glowing splint relights when it is held inside.
What is the independent variable?
Measurement
Comparison
What is being tested
The independent variable is what is being tested (option C).
What is an independent variable?Independent variable is the variable that is manipulated or changed in a series of an experiment.
On the other hand, a dependent variable is the variable that is being measured or recorded in the experiment.
For example, in an experiment where the effects of temperature is tested on the rate of change of a chemical reaction, the temperature is the independent variable because it is what is being tested.
Therefore, the independent variable of an experiment is what is being tested.
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Your little brother found a strange object and brings it to you in a jar.
he is sure it is alive, describe three scientific observations you could
make to help you decide whether it's a living organism or not.
Answer:
Is it moving?
Is it breathing (the movements became slower because there's more carbon dioxide in there now)?
Is it eating? (Give it a fruit or a vegetable or a meat)
when we view a stimulus with a specific property, neurons tuned to that property fire and will eventually become fatigued, an effect called adaptation.
Selective adaptation is when we view a stimulus with a specific property, and the neurons tune to that property fire, eventually becoming fatigued.
Neurons tune to a particular attribute fire when we see a stimulus with that property; over time, this firing fatigues the neurons or causes them to adapt. The neuron's firing rate drops due to this adaptation and fires less often when the same stimulus is provided to it again right away.
For instance, a page of plain black text on a white backdrop will undoubtedly capture your attention and make it easier for you to identify important information. However, if you keep viewing pages and pages of mainly neon pink highlights, you'll probably grow accustomed to them, and they will eventually stop drawing your attention.
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How does the valve on the cooler compare with the switch in an electric circuit
The valve on the cooler compare with the switch in an electric circuit such that opening the valve allows water to flow, just like opening a switch allows charges to flow.
What is Valve?This refers to a substance which regulates the flow of a liquid by opening or closing it and is commonly used in pipes and other types of fittings. It also has some similarities in functions with that of a switch which is used in an electric circuit.
Opening the valve allows water to flow which is the same as how opening a switch allows charges to flow and vice versa which is the most appropriate comparison between the two substances.
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Multiple Choice
Which of the following is the term used when pollen from GMO crops fertilizes non-GMO plants?
O gene splicing
O genetic drift
O crossbreeding
O outcrossing
The term used when pollen from GMO crops fertilizes non-GMO plants is: (c) crossbreeding.
GMO crops are the genetically modified crops. These are those plants that get their genetic sequence modified using various techniques so as to bring out the best characteristics and yield from the plant. The modification can be in the form of addition, deletion or exchange of genes. Various crops that have been modified are: soybean, cotton, potato, etc.
Cross-breeding is the mating between two organisms that may be of different species, breed or variety. Since GMO crops and non-GMO crops do not belong to the same variety, they can have cross-breeding between them.
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since cells are filled with water, what would happen to biologically important molecules if they were held together with ionic bonds?
Ionic bonding involves electrostatic interactions between oppositely charged ions, and can significantly enhance the binding strength of biomolecules immobilized to materials.
A chemical link known as an ionic bond occurs when an electron is transferred from one atom to another. Ionic bonding requires the presence of an electron acceptor and an electron donor, which is frequently a metal (often a nonmetal). Electrovalence is the process of moving electrons. A positive ion, also known as a cation, is created when an atom loses one or more electrons. The other atom that picks up one or more electrons will change into a negative ion known as an anion. The elemental name is modified by adding a -ide at the end to designate the ion that accepts the electron. For instance, the name of the anion of chlorine is chloride while the anion of sulfur is sulfide.
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why does a fever become dangerous to body functions if it continues to rise? why does a fever become dangerous to body functions if it continues to rise? dehydration will occur. proteins become denatured and are unable to complete their jobs. osmosis may be affected due to lack of water. a fever breaking is more dangerous than the fever itself.
A fever can become dangerous to body functions if it continues to rise because: the proteins become denatured and are unable to complete their jobs.
Fever is the physiological condition of the body where the body temperature is higher than normal. The normal temperature of the body is around 98.6°F. If the temperature rises above 99°F, then the body can be said to be in a state of fever.
Proteins are the polymers of amino acids. These are the most important macromolecules that perform major of the functions and reactions in the body. Protein can only work in a specific form of structure and if that structure is ruptured the protein is said to be denatured.
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Which of the following isn’t one of the eight characteristics of life?
A) Homeostasis
B) growth
C) movement
D) using energy and resources
Answer: c)movement
Explanation: