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Related Questions
Which statement best describes the evolution of hominid structure over time?
The size of the skull decreased.
O The size of the brain cavity increased.
O The shape of the head became flatter.
The shape of the teeth became more pointed.
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Answer:
The size of the brain cavity increased.
Explanation:
Over the years the brain cavity got bigger and so did our brain and that is why humans are smarter
The evolution of hominid structure over time involved the increase in the size of the brain cavity.
What is evolution?Evolution refers to the gradual and cumulative changes that occurred in organisms over a long period of time which made them more complex and which they were able to transmit to their offspring.
The hominids were the ancestors of the modern day humans.
Through the process of evolution, the size of the brain cavity increased in hominids resulting in larger brains and more complexity as seen in modern humans today.
Therefore, the increase in the brain cavity of hominids occurred through the process of evolution.
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Moles are mammals that live underground and eat worms. The moles are adapted to use their sense of smell to locate their food. Which environmental change would MOST LIKELY allow for an increase in the number of moles born with a better sense of smell?
A.
More rainfall makes the soil harder for digging so the moles need to have a better sense of smell to locate the worms.
B.
Less rainfall causes the worms to come closer to the surface so the moles need to have a better sense of smell to locate the worms.
C.
More rainfall makes the soil easier for digging so the moles need to have a better sense of smell to locate the worms.
D.
Less rainfall causes the worms to burrow further underground so the moles need to have a better sense of smell to locate the worms.
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Answer:
I think the answer is D
Explanation:
Because if there is less rainfall that will make it harder for the moles to look for the worms and to sense the worms so they will have to have sense harder or dig harder to get the worms. hope this helps!
Less rainfall causes the worms to come closer to the surface so the moles need to have a better sense of smell to locate the worms.
What are adaptations of moles?Moles are adapted to use their sense of smell to locate their food, which is mainly worms. In dry conditions, worms tend to come closer to the surface in search of moisture and as a result, moles would need to have a better sense of smell to locate the worms.
In this scenario, the moles with better sense of smell would be more successful in finding food and would be more likely to survive and reproduce, passing on their advantageous traits to the next generation. This would lead to an increase in the number of moles born with a better sense of smell.
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Fertilizers added by farmers to the soil contained high amounts of nitrates. How do fertilizers affect the nitrogen cycle.
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Pls help pls pls pls pls pls pls pls pls 6th grade science 30 points
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Describe the function of. Endoplasmic reticulum
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Which step is irrelevant to investigating a foodborne illness outbreak
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Help witg number 7
Please its esay
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Can we please please help
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Answer:
I would say d
Explanation:
Answer:
i think the answer is d.
1) Discuss two neurotransmitters and their functions? 2) The central nervous system is comprised of what two structures? 3) What is the purpose of the autonomic nervous system? 4) What brain system is involved with memory and emotions? 5) What purpose do convolutions, folds, and fissures (on the brain surface)serve in relation to brain functions 6) What is the purpose of the endocrine system? 7) What is the purpose of Myelin in the nervous system. 8) BONUS (EXTRA CREDIT POINTS)- IN RELATION TO NEUROTRANSMITTERS, WHY DO SOME PEOPLE SAY LAUGHTER IS THE BEST MEDICINE? 2 points
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Answer:
1. dopamine and serotonin
2. brain and spinal cord
3. controls the function of different processes in the body
4. limbic system
5. Increase brain surface area
6. release hormones into the bloodstream
7. insulation
8. laughing has multiple positive functions in the body
Explanation:
Dopamine is a neurotransmitter (i.e., a chemical messenger) involved in responses to rewards, motivation and memory, while serotonin is another neurotransmitter that controls appetite, mood, wakefulness and sleep onset. The central nervous system (CNS) consists of the brain and spinal cord. The spinal cord acts as a conduit by which messages are sent from the brain to the body and from the body to the brain. Moreover, the brain acts to control all body abilities (e.g., thinking, talk, feeling, walking, breathing, etc). The autonomic nervous system is known to modulate different processes (e.g., blood pressure, digestion, breath) and internal organs (e.g., heart) by acting largely unconsciously, i.e., without a person's conscious effort. The limbic system is a part of the brain that acts to control emotions and memory by modulating autonomic/endocrine functions. Convolutions, folds, and fissures can increase brain surface area, thereby more neurons are packed into the cortex of the brain and thus it is possible to process more information. The endocrine system acts to release hormones into the bloodstream. These hormones travel in the blood to their target cells/tissues, where they regulate different functions (e.g., mood, growth, development, metabolism, reproduction, etc). The myelin is an insulating layer surrounding nerve cells that enables electrical impulses to transmit efficiently around the whole body. Laughing has multiple positive functions: release endorphin hormones that decrease stress, increases the number of immune cells and antibodies, stimulate the activity of internal organs (e.g., heart), quickly relax the muscles, contribute to increase the oxygen uptake rate in blood, etc.
How many grams of water are in 8.16 x 1022
molecules?
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An exotic species is the same as an invasive species.
True
False
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Answer:
False
Explanation:
Exotic species are species brought to and unfamiliar environment, just like invasive species. There is a difference between the two however. Exotic species are indeed not native to their environment, but unlike invasive species, they are not harmful to the ecosystem. In order for an exotic species to become invasive, it must out-compete native organisms for food and therefore cause harm to the ecosystem. Non-native species that do not out-compete species remain exotic and not a high risk of disrupting the ecosystem.
Hope this helps!
In a living organism, what is an organ?
ОА.
a structure that provides a specific service within a cell
Св.
a group of similar cells that perfom a common function
C.
functional unit, or building block, of all organisms smallest unit that can carry on the activities of life
a structure composed of a number of tissues that work together to perform a specific task
0.
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Answer:a structure composed of a number of tissues that work together to perform a specific task
Explanation:
Most eukaryotic mRNAs are shorter than the genes that encode them. The reason for this is __________.
A. that exons are spliced out of the hnRNA
B. that introns are spliced out of the DNA
C. that eukaryotic genes contain both introns and exons
D. the addition of the poly-A tail to the genomic DNA
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20. Allosteric effectors: a. can cause large changes in enzymatic activity. b. can lead to a decrease in the availability of a protein. c. do not alter the sensitivity of a metabolic pathway. d. decrease the sensitivity of the enzyme at nearly all concentrations of substrate. e. alter enzyme activity by binding to the active site of an enzyme.
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Answer:
a. can cause large changes in enzymatic activity.
Explanation:
An enzyme refers to a biological catalyst that is typically used to speed up (accelerate) the rate of a chemical reaction by lowering the activation energy of its reactants.
When the activation energy of a reaction is low, the rate of the reaction would be faster. Therefore, an enzyme speeds or catalyzes the rate of a reaction by lowering its activation energy. Also, if the conditions are not optimal for an enzyme, it limits the ability of an enzyme to bind or be joined with its substrates. An increase in temperature increases or speeds up the rate of a reaction while low temperature limits or reduces the rate of a reaction. The optimal temperature for enzymes in the human body is around 37 degrees celsius.
An allosteric effector can be defined as an agent, organ or molecule that is being binded to an enzyme at a site, thereby causing a reduction (negative effect) or an increase (positive effect) in an enzyme activity.
Hence, an allosteric effector can cause large changes in enzymatic activity because it acts as an intermediary and mediates specific effect in a metabolic pathway.
Suppose that you are an explorer who has found a new species of plant. Some of the plants have red flowers and some have yellow flowers. You cross a red-flowered plant with a yellow-flowered plant and all the offspring have orange flowers. What is the most probable explanation
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Answer:
Incomplete dominance
Explanation:
In genetics, incomplete dominance refers to an inheritance mode in which two gene variants (i.e., alleles) of the same locus combine in a way that neither allele dominates the other. This phenomenon is similar to codominance, but in this last case, both alleles are dominant. Incomplete dominance produces a new phenotypic trait resulting from the combination of both non-dominant alleles. An example of incomplete dominance includes the pink color of snapdragons resulting from the cross of red-flowered snapdragons with white-flowered snapdragons.
All organisms must regulate_____ by turning genes on and off different cells at different times. In prokaryotic cells, related genes may be organized into_____, which can be turned on and off as a single unit. Eukaryotes have more complex modes of control, including the packing of chromosomes,____(which can produces several mRNAs from a single gene), and the control of translation. An understanding of gene regulation mechanisms has led to several interesting and important applications. For example, the loss of gene regulation can result in cancer, or out-of-control cell growth. And___can produce new live individuals, while___can produce potentially therapeutic stem cells.
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Answer:
All organisms must regulate gene expression by turning genes on and off different cells at different times. In prokaryotic cells, related genes may be organized into operons , which can be turned on and off as a single unit. Eukaryotes have more complex modes of control, including the packing of chromosomes, RNA slicing (which can produces several mRNAs from a single gene), and the control of translation.
An understanding of gene regulation mechanisms has led to several interesting and important applications. For example, the loss of gene regulation can result in cancer, or out-of-control cell growth. And reproductive cloning can produce new live individuals, while therapeutic cloning can produce potentially therapeutic stem cells.
What is Adhesion
A. The ability of molecules to stick to molecules that are the same
B. The ability of molecules to stick to any molecules
C. The ability of molecules to not be able to stick to any molecules
D. The ability of molecules to stick to different molecules
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Answer:
D. The ability of molecules to stick to different molecules
Explanation:
Which of the following is table sugar?
glucose
fructose
sucrose
galactose
lactose
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Answer:
sucrose & galactose
What is Cohesion?
A. The ability of a molecule to stick to any molecule
B. The ability of molecules to stick to molecules that are different
C. The ability of a molecule to stick to molecules that are the same
D. The ability of molecules to not be able to stick to anything.
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Answer:
The ability of a molecule to stick to molecules that are the same (C)
Explanation:
physics
the sticking together of particles of the same substance.
Answer:
I am sure the answer is C. The ability of a molecule to stick to molecules that are the same.
Explanation:
I hope this helps!
The smaller the dose required to achieve a drug action the greater the drug potency try or false
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Answer:
the answer is true
The number of chromosomes in a sex cell of an organism is its ________chromosome number.
a. one
b. haploid
c. RNA
d. diploid
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Answer:
In sexually reproducing organisms, the number of chromosomes in the body (somatic) cells typically is diploid (2n; a pair of each chromosome), twice the haploid (1n) number found in the sex cells, or gametes. The haploid number is produced during meiosis.
Which greeting uses a formal style? Dear Auntie Mae, Hey Gregor, To Sixth Grade Students: Howdy Youth Group–
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Answer:
To Sixth Grade Students: this is correct i got dear aunt may wrong on my unit review and showed this was the correct answer
Explanation:
Answer:
C
person above me is correct
give them brainliest :)
Explanation:
Members of the Kingdom Plantae are characterized by _ while members of the Kingdom Fungi are characterized by ---
cell walls of cellulose; cell walls of chitin
heterotrophy, autotrophy
mostly unicellular organisms; having segmented bodies with jointed appendages
having segmented bodies with jointed appendages; mostly unicellular organisms
d
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Answer:
Heterotrophy, Autotrophy
Reasoning: Heterotrophy organisms are organisms who can't retrieve food themselves and use energy and sunlight in order to get their food, which is exactly what plant cells do. Autotrophy is the ability to produce things such as carbon dioxide and oxygen, which plants do as well. Hence, Heterotrophy and Autotrophy are the most reasonable answers.
Which scenario describes a relationship of predator-prey?
Birds feed off the insects that are stirred up from the grasses as cattle move through.
A polar bear catches a seal for dinner.
A tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat.
Oxpecker birds eat parasitic ticks off the backs of zebras.
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Answer:
A polar bear catches a seal for dinner
Explanation:
Will give brainliest
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Answer:
C) is the correct answer
Explanation:
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Please help me, List the living and non- living things shown in the picture, marking Brainly !
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Answer: Living- hair,girl butterfly,cow,bacteria,tree,Jellyfish,seaweed,mouse,
Non-living-Computer,cellphone,robot, car,clouds,wind,fire,fossil,lightning,bread,clock,sand,snowman,sun,jack-o-lantern
Explanation:
How are the electrons in the PS II system replaced?
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Answer: Photosystem I obtains replacement electrons from the electron transport chain. ATP provides the energy and NADPH provides the hydrogen atoms needed to drive the subsequent photosynthetic dark reaction, or Calvin cycle.
Explanation:
Describe the modification of FGF5 pre-mRNA that leads to the production of both the FGF5-L and FGF5-S proteins.
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Answer:
Splicing of exons and exclusion of introns
-mRNA that is transcribed from DNA usually has large regions of genetic code that just do not code for anything. This is a pretty conserved phenomenon among eukaryotes, to have meaningless sequences of DNA (introns) separating the meaningful sequences of DNA (exons). Introns must be spliced out of mRNA so that its translation leads to a functional protein.
Explanation:
This question may be completed independently or as a group exercise. You have learned that humans have 46 total chromosomes, and chimpanzees have 48 total chromosomes. Use other textbooks in biological anthropology and biology (or reputable online resources) to find the number of chromosomes in other organisms. Give an organism with considerably more chromosomes than humans. Give an organism with considerably fewer chromosomes than humans. Did your findings surprise you
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Answer:
In comparison to humans, there are more chromosomes in the Hermit crab that is 127 pairs of chromosomes for a grand total of 254 and in Myrmecia pilosula has fewer chromosomes than humans.
The complexity of an organism or how advance is an organism has nothing to do with the number of chromosomes it had. The chromosome number is subject to change over time. Human ancestors had more chromosome numbers as compared to now but they are not advanced to us.
Name a plant that has asexual reproduction. Does it have a flower?