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Mila [183]
3 years ago
7

Which of these best describes extinction events?

Biology
2 answers:
SpyIntel [72]3 years ago
7 0

Answer: D. Extinctions occur at higher rates during times of ecological stress when populations and species are poorly adapted.

cupoosta [38]3 years ago
4 0

Answer:

Extinctions occur at higher rates during times of ecological stress when populations and species are poorly adapted

Explanation:

Evolution has made it known to us that organism goes to extinction as a result of changes in ecological stress without being able to adapt by this organism to the new changes, hence; leads to extinction.

Charle's darwin theory of natural selection discuss about '' survival of the fittest'' when an organism fails to survive during harsh environment changes, it leads to extinction of such organism. Dinnosaur were able to go into extinction as a result of environmental changes which they are unable to adjust, thus; they went to extinction.

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Which molecule is the final electron acceptor for electrons from photosystem I? a. Oxygen b. Chlorophyll in photosystem II c. Ca
Mumz [18]

The molecule which is the final electron acceptor for electrons from photosystem I is (d) NADP⁺.

Photosystem I is the protein complex involved in the process of photosynthesis. It captures the light energy to mediate the transfer of electrons from a series of electron transporters. It is involved in non-cyclic as well as cyclic photophosphorylation.

NADP⁺ is the Nicotinamide Adenine Dinucleotide Phosphate. It acts as a coenzyme. It is an important constituent in various anabolic reactions like Calvin cycle, lipid and nucleic acid syntheses, etc. The oxidized form of NADP⁺ is NADPH. It is present in organisms of almost all kinds.

To know more about photosystem I, here

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3 0
10 months ago
Which of the following statements best describes the effects that removing the arrow pointing from G to C would have on the envi
Ad libitum [116K]

Answer:

I THINK its c but I' not sure

Explanation:

5 0
2 years ago
If Darwin was to be alive today, what do you think will be his observation on evolution?​
STatiana [176]

Darwin would be happy that his theory of evolution is correct. Stating that biological evolution is through natural selection of inherited traits that enable a species to survive, compete and reproduce.

5 0
2 years ago
What are prions? (A) mobile segments of DNA (B) tiny circular molecules of RNA that can infect plants (C) viral DNA that attache
larisa86 [58]

Prions are misfolded versions of normal proteins that can cause diseases. So the correct option is D.

<h3>What leads to prion disease? </h3>

A misfolded confirmation of proteins is called Prions. These misfolded proteins can result in harmful functional proteins and cause several diseases.

A prion is the type of protein that usually cause the normal proteins in the brain to fold in an abnormal manner. This results in misfolding of proteins in the brain.

Prion diseases are known to affect both humans and animals. Sometimes, humans get prion diseases by consumption of by meat from infected animals.

Creutzfeldt-Jakob disease is the most common prion disease in humans. The occurrence of prion diseases is rare. In the US, about 300 cases are reported every year.

Therefore the correct option is D.

Read more about prion diseases, here

brainly.com/question/13513153

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7 0
1 year ago
What is female reproductive system? Please explain it to me. Do not Google the answer. ​
Arlecino [84]

Answer:

reproductive system

Explanation:

6 0
2 years ago
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