Answer:
NEPHRONS ARE THE FUNCTIONAL AND STRUCTURAL UNIT OF KIDNEYS...
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Ans: Option (B) Mitosis
DNA replication occurs just before the process of cell division, which is also called mitosis.
Mitosis is when the cell is being divided into two, and this is when DNA starts to replicate and it produces more and more cells and the process continues. In other words, mitosis<span> is a part of the cell cycle when replicated chromosomes are separated into two new nuclei. Before that process(mitosis), DNA replication occurs. Hence the correct option is (B) Mitosis.</span>
Answer:
It is true that studying natural selection in the fields can be challenging. Some of the challenges which Darwin might have faced could have been:
Darwin was only studying one trait for his results. But there might have been many other factors or traits affecting natural selection.
Natural selection does not happen rapidly hence Darwin would have had to wait for many generations to observe the results.
The environment is not such an easy factor to study. It is complex. It might have happened that the environment might have changed before any changes were seen in the population of the birds.
<span>The answer would be Cell specialization</span>
High temperatures and greater rainfall increase the rate of chemical weathering. 2. Rocks in tropical regions exposed to abundant rainfall and hot temperatures weather much faster than similar rocks residing in cold, dry regions. ... Soils affect the rate in which a rock weathers.
