name the two worst extinctions known in Earth’s history.
Explanation:
Permian Triassic ExtincitonLots of places were affected, extinction; in species, vertebrates, etc, etc.
Devonian extinctionExtinction-- in marine species...
Cells that live in environments where oxygen is present only a small amount of the time have two options to survive. They can be obligate anaerobes, which are poisoned by oxygen and do full cellular respiration with an electron transport chain that ends in a different molecule than oxygen (such as sulfur.) Alternatively, they can be facultative anaerobes that do full cellular respiration with oxygen when oxygen is available but do fermentation with glycolysis when oxygen is not available. Full cellular respiration makes 32 ATP per glucose. Glycolysis makes only 2 ATP per glucose. Write out which option you think is better in an environment that only occasionally (rarely) contains oxygen, obligate or facultative anaerobe, and defend your answer.
by defending the answer is that aerobic respiration is used by oxygen but anaerobic respiration is not used by oxygen also plants they do survive at night but human being cannot breathe the same air with plants at night because oxygen take place but at the daytime we use carbon dioxide this is how I do understand in my understanding
. Which statement most accurately explains how the author analyzes the
relationship between vacation time and productivity in the article "Vacation and
Presenteeism"?
A. The author relies on the words of European employers and Americans working in
Europe.
B. The author combines information on current vacation policies with statistics on
worker productivity.
C. The author provides a series of anecdotes relating how more vacation time
produces more efficient workers.
D. The author fully discusses Americans’ attitudes towards their jobs and contrasts
these attitudes with European attitudes towards vacations.
Answer:
D. The author fully discusses Americans attitudes towards their jobs and contrasts these attitudes with European attitudes towards vacation.
Explanation:
The author has tried to present the two different attitudes of the people of two different countries on the vacation. The American have different attitudes towards the vacation. They feel excited when there is vacation while the people in European countries prefer a day off rather than long vacations.
Pls help and thank me
Mitosis is responsible for growth, repair, and maintenance in an organism because
Answer:
Explanation:
This is because mitosis produce two daughter cells that are genetically identical to each other thereby producing new cells that are particular to different tissues thereby making it to grow. These new cells that are genetically identical replaced the old or damaged cells , it's repair and also help in healing process.
Match the following terms and definitions. 1. an electrical nerve impulse sent by nerve fibers to the central nervous system for interpretation chemoreceptors 2. neurons that detect chemicals such as those found in food effector 3. type of eyes many arthropods have; eyes that protrude outward and consist of many lenses electroreceptors 4. the structure that gives the response to an environmental change compound eyes 5. neurons that detect electrical fields action potential 6. secretion of hormones into the blood stream to affect distant processes endocrine
Answer:
1. an electrical nerve impulse sent by nerve fibers to the central nervous system for interpretation. Action potential.
2. neurons that detect chemicals such as those found in food. Chemoreceptors.
3. type of eyes many arthropods have; eyes that protrude outward and consist of many lenses. Compound eyes.
4. the structure that gives the response to an environmental change. Effector
5. neurons that detect electrical fields. Electroreceptors.
6. secretion of hormones into the blood stream to affect distant processes. Endocrine.
Explanation:
An action potential is a change in the internal charge of a cell due to depolarization. These changes allow the transmission of a message from any part of the body to the central nervous system. The central nervous system will interpret the message and will give a response.
There are different types of receptors in our bodies. Chemoreceptors are the ones that detect chemicals and produce an action potential or a neurotransmitter. These receptors respond to chemicals. Another type of receptor is the electroreceptors. They detect electrical fields and are only on the skin of aquatic animals.
Compound eyes have a large number of ommatidia. As a result, the anthropods with this type of eyes have a large view angle. In other words, every ommatidium sees an image, and the final product is a combination of all of them.
The effector is the structure that gives an answer once an affector has sent the message to the nervous system that there was a change in the environment.
There are different kinds of secretions, autocrine, paracrine, and endocrine. In the endocrine secretion, the gland secrets hormones into the bloodstream so that they can travel long distances up to their target cell, which is far from the gland.
1. an electrical nerve impulse sent by nerve fibers to the central nervous system for interpretation. Action potential
2. neurons that detect chemicals such as those found in food. Chemoreceptors
3. type of eyes many arthropods have; eyes that protrude outward and consist of many lenses. Compound eyes
4. the structure that gives the response to an environmental change. Effector
5. neurons that detect electrical fields. Electroreceptors
6. secretion of hormones into the blood stream to affect distant processes. Endocrine
Why might parents who don't show the trait of albinism have children who do?
Answer:
This trait is rare when it occurs. Some genes depend on other genes to be expressed, so in most cases a trait is denied an expression. But its still there, so it passes down to generation until it gets expressed.
Explanation:
Answer:
Because it's a recessive trait
Explanation:
There are two chromosomes that determine your biological sex: XX for the female and XY for the male. You inherit one X chromosome from your mother and one X or Y chromosome from your father, which is what determines your sex.
A certain inheritable genetic condition can be recessive or dominant. If it's dominant, it shows even if just one chromosome carries that condition. If it's recessive, it has to be in both ones (or just the x one or just y if you're male. That's why some conditions, such as daltonism, affect men more that women).
For example, blue eyes are a recessive trait, brown eyes are a dominant trait. If your parents are both blue eyed, you will surely have blue eyes as well. The same can't be said if both of your parents have brown eyes: they might still be carrier of the blue eyed trait (both of them have to), in which case you would have a 25% chance (1/4) to have blue eyes (½ to inherit the carrier chromosome from your mother; ½ from your father). The same can be said about albinism
What is one reason a cell would need to divide?
Answer:
Why Do Cells Need to Divide. Organisms, either unicellular or multicellular, are made up of cells. One of the characteristic features of cells is the division. Cells divide for many reasons, including growth, repair and regeneration, and reproduction. The two types of mechanisms of cell division are mitosis and meiosis.
Explanation:
4. A bacterial cell is prokaryotic, while the protist, Euglena, is eukaryotic. Which structure is present
in both organisms?*
(10 Points)
Answer:
There are a couple different possible answers, since there are multiple different structures that are present in both types of cells. So you have to make the choice of what to put.
The structures that prokaryotic and eukaryotic cells have in common are: plasma membrane, ribosomes, and cytoplasm
What are the five layers of the atmosphere in order from bottom to top?
Exosphere, Stratosphere. Thermosphere, Mesosphere. Troposphere
Troposphere, Stratosphere, Mesosphere. Thermosphere, Exosphere
Stratosphere, Thermosphere, Mesosphere, Troposphere, Exosphere
Answer:
The atmospheric layers start from the ground level of the earth and rise up to a certain height according to its temperature, pressure, composition, and other properties. From the ground level they are:
Troposphere:- (0 -12 km) or (0 to 7 miles)
Stratosphere:- (12 -50 km) or (7 to 31 miles)
Mesosphere:- (50 -80 km) or (31 to 50 miles)
Thermosphere:- (80 -700 km) or (50 to 440 miles)
Exosphere:- (700 -10000 km) or (440 to 6200 miles)
Explanation:
Answer:
this is the answer
Explanation:
Which of the following is defined as the ability to be changed or change according to circumstance
Answer:
flexibility
Explanation:
please help tephographic map
Answer:
1 weathering 2 erosion 3 deposition
Explanation:
assuming this portrays a mountain the rain starts at the top eroding down the mountain carrying any sediment and then is deposited at the base
Evaluate your proposed solutions for their impact on overall environmental stability and changes. Which solution has more impact? Explain your reasoning for picking one solution over another
Which choice is involved in both sexual and asexual reproduction?
Answer:
seeds
Explanation:
Answer:
seeds
Explanation:
I took the test right now k12
A circuit consists of a wire, a lightbulb, a switch, and a battery. What would happen if the battery were replaced with a section of wire?
In the photo of the house; What is happening to the foundation of
the house?
Answer:
errosion is causing it to crumble and become unstable
If a strand of DNA has the nucleotide sequence: GACTAC, what is the complementary sequence of RNA nucleotides that would be made from it?
Answer:
CUGAUG
Explanation:
[tex]G=>C[/tex]
[tex]C=>G[/tex]
[tex]A=>U[/tex]
[tex]T=>A[/tex]
Transport is the function of the protein known as hemoglobin . State the name and function of another protein. Do not use enzymes or membrane proteins for your answer . Name :
Answer:
keratin.
Explanation:
keratin is a fibrous protein that has protective and structural functions in the body.
to fulfil it's functional necessities keratin has characteristics that makes it insoluble and repellent to damage.
to fulfil it's functional necessities keratin has characteristics that makes it insoluble and repellent to damage.in the human body, keratin can be present in - hair and finger nails.
hope it helps. :)
The solar system the sun understanding main ideas label the diagram of the sun below
If you have the answers to the diagram please help me out my dudes ):<<
Answer:
sorry you dont have a diagram depicted
Explanation:
Mom has O blood and dad has O blood. What blood type(s) will their children have?
Answer:
A mother who is blood type O can only pass an O allele to her son or daughter. A father who is blood type AB could pass either an A or a B allele to his son or daughter.
Explanation:
Hope this helped :)
I need help ASAP pleaseeee
Answer:
Subscribe Single-3 FF on yt
28)
What is a molecule made from joining together small molecules called monomers?
A)
amino acid
B)
glucose molecule
C)
nucleotide
ne
D)
polymer
20
Answer: D)
polymer
Explanation:
10
What type of boundary has plates that slide past each other?
A) convergent
B
transform
C divergent
D
tension
Answer:
B
Explanation:
Transform. It like slides past eachother and transforms
50 points and brainliest
Type 2 things that you learned that are unique to humans’, flatworms’, and plants’ waste removal systems.
(two each)
real answers please
Explanation:
while these infections can occur in cows and pigs, it isn't an animal-specific condition. Tapeworms can also infect humans, although it's not a common infection. The Centers for Disease Control and Prevention (CDC) estimates there are less than 1,000 new tapeworm infections in humans in the United States eachwhile these infections can occur in cows and pigs, it isn't an animal-specific condition. Tapeworms can also infect humans, although it's not a common infection. The Centers for Disease Control and Prevention (CDC) estimates there are less than 1,000 new tapeworm infections in humans in the United States each
If Mary is born with a genetic disease that causes her to have half a heart instead
of a full one. What is the cause of this disorder? Make sure to mention DNA,
RNA, and Proteins.
What is the difference between a) prokaryote and eukaryote; b) autotroph and heterotroph; c) unicellular and multicellular?
Answer:
Explanation:
a) eukaryotes have membrane bound organelles like nuclei while prokaryotes don't
b) autotrophs = producers that can make their own food while heterotrophs consume producers or other consumers
c) Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function
Make a male heterozygous tall pea plant with a female short plant.
Answer and Explanation:
Hello. I believe you want to know the result of a cross between a tall pea plant and a low pea plant. Well, to visualize the cross between these two plants, it is necessary to know which characteristics have the dominant and recessive alleles, as you did not mention, let's assume that the high plant has the dominant characteristic that will be represented by the "TT" alleles, while the low pea plant will have the recessive characteristic, represented by the "tt" allele.
A dominant characteristic is one that has dominant alleles in its composition. These alleles are represented by capital letters and signify the genes that determine a characteristic. The characteristic of a dominant allele will always be seen in the offspring of a cross, as long as that allele appears in hom0zygosis (two dominant alleles as "TT") or hetorozygosis (a dominant allele and a recessive allele as "Tt"). The characteristic of the recessive allele, on the other hand, will only be seen in the offspring of a cross, if it is presented in hom0zygosis (two recessive alleles as "tt").
In the figure that is attached below, you can see how a high pea plant (TT) crosses with a low pea plant (tt). This crossing is done by combining each allele of the tall plant with each allele of the plant, which resulted in a completely heterozygous offspring, with the "Tt" alleles. As mentioned above, the recessive characteristic only appears if there are two recessive alleles. In this case, we can consider that the entire offspring were tall pea plants, since all plants have the dominant allele.
Describe methods of replication and protein synthesis in bacteria and viruses.
How does this differ from eukaryotes.
Answer:
Explanation:Unlike bacteria, viruses can't survive without a host. They can only reproduce by attaching themselves to cells. In most cases, they reprogram the cells to make new viruses until the cells burst and die. In other cases, they turn normal cells into malignant or cancerous cells.
What is a prokaryotic cell? Differentiate a prokaryotic cell from a eukaryotic cell.
Answer:
The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. ... The nucleus is only one of many membrane-bound organelles in eukaryotes. Prokaryotes, on the other hand, have no membrane-bound organelles.
Hope this helps!
what is the relationship between abrasion and the hardness of a rock mineral?
Answer:
Hardness (H) is the resistance of a mineral to scratching. The degree of hardness is determined by observing the comparative ease or difficulty with which one mineral is scratched by another or by a steel tool.
Explanation:
https://www.britannica.com/science/mineral-chemical-compound/Hardness Hope this helps