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JulsSmile [24]
3 years ago
12

All evolutionary changes that allow a species to change in response to the environment are originally a result of A) beneficial

DNA mutations. B) movement to new environments where survival is easier. C) cross-breeding with other species of closely related organisms. Eliminate D) adaptations that organisms make to the environment during their lifetimes.
Biology
2 answers:
pychu [463]3 years ago
8 0

The answer was actually A.) Beneficial DNA Mutations

Gemiola [76]3 years ago
7 0

Answer: D. adaptations that organisms make to the environment during their lifetimes.

Adaptation is a process in which changes occurs in an organism so as to make it better suited for the environment. It is the result of natural selection. In adaptation the traits of an organism gets modified by the process of natural selection which results in evolution of an organism.  

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is a pesticide that influenced society by increasing crop yield, but it also caused human and animal sickness.
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Your answer is:
DDT

is a pesticide that influenced society by increasing crop yield, but it also caused human and animal sickness.

I hope this helped you!
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3 years ago
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imagine a cell-surface receptor protein is being newly synthesized. How can it get into the membrane that it will ultimately be
motikmotik

Answer:

the steps for a new receptor synthesis:

Explanation:

Do not forget the steps vary from an eukarityc cell to prokarityc one.  

IN AN EUKARYOTIC CELL:

1- Transcription: in the nucleus, mRNA is synthesized from the DNA sequence that codifies the protein. Exons are spliced if needed by spliceosomes.  

2- From nucleus into cytoplasm: mRNA goes through nuclear membrane into the cytoplasm were ribosomes, substrates for protein synthesis and other organelles are.

3- Ribosomes recognize a signal in mRNA and start reading the genetic code, three consecutive nucleotides at a time and adjust the correspondent tRNAs (tRNAs carry the aminoacids)  

4- Peptide bonds are formed between consecutives aminoacids, and a polypeptide is build up according to the mRNA sequence.

5- (The mRNA has a signal that is recognized by the rough endoplasmic reticulum) The peptide goes into this reticulum (RER) and then into Golgi apparatus. (more chemical modifications are made if needed). By this moment the protein has an inserted portion in a lipid membrane.

6- The protein is transported in a vessel that finally fusions with cytoplasmic membrane and the receptor is in destiny. Hydrophobic aminoacid sequences are inserted in membrane.

IN A PROKARYTIC CELL:

1- Transcription (no splicing is needed, there are not exons)

2- There are not nucleus and cytoplasm divided (no transport)

3- Ribosomes recognize a signal in mRNA and start reading the genetic code, three consecutive nucleotides at a time and adjust the correspondent tRNAs (tRNAs carry the aminoacids)

4- Peptide bonds are formed between consecutives aminoacids, and a polypeptide is build up according to the mRNA sequence.

5- The mRNA has a signal that is guides the growing protein to cellular membrane. Hydrophobic aminoacid sequences are inserted in membrane.

8 0
3 years ago
Why are both biotic and abiotic features important in ecosystems and biomes?
Sati [7]

Answer:

Hope this is helpful! Sorry if my answer is choppy.

Explanation:

Biotic and abiotic features are both important in ecosystems because for example, a biotic factor like a plant, relies on an abiotic factors like the rain and the sun. If the rain were non existent, then the plants would no longer be alive causing a chain reaction in the food system. Biotic factors like plants and animals that are non existent can also cause negative effects in biomes and ecosystems.

3 0
3 years ago
PLZ ANSWER FAST!!
Harlamova29_29 [7]

Answer:

I think its D

6 0
3 years ago
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Organisms belonging to the same____would be the most closely related?
Zanzabum
Organisms belonging to the same faimly would be the most closley related.
8 0
3 years ago
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