Answer:
Explanation:
The first piece of evidence that needed to be found to support the endosymbiotic hypothesis was whether or not mitochondria and chloroplasts have their own DNA and if this DNA is similar to bacterial DNA. This was later proven to be true for DNA, RNA, ribosomes, chlorophyll (for chloroplasts), and protein synthesis.
Answer:
Option A, helps prevent rapid breakdown of the messenger RNA
Explanation:
The poly-A tail is a chain of adenine nucleotides which when get attached to the messenger RNA during RNA processing enhances the stability of the molecule and therefore prevents it from breaking down. This is required because after the transcription of gene in a eukaryotic cell, newly formed RNA molecule undergoes several modifications. It also helps is preventing the new RNA from enzymatic degradation in the cytoplasm and translation.
Hence, option A is correct
The answer ito the question is B
Answer:
E. only the first and second choices
Explanation:
Small animals often have smaller habitat ranges than other larger animals.
This means they have fewer places where they can survive, needing some specific environmental conditions. More specific than some bigger animals.
Small animals often have more specialized requirements for living than larger animals.
Some little changes in temperature or weather can affect a lot to some small animals and can not affect bigger ones.
