Answer:
Option A, keystone species
Explanation:
Keystone species are responsible for controlling any species from becoming dominant over all other species. The keystone species are found at the top of all the energy pyramids and food chains.
They control the explosion of population of prey and hence regulate the overall ecological diversity.
Some common example of keystone species is as follows –
Bison, prairie dog, large mammalian predators,
Hence, option A is correct
False. Strontium 90 has a half life of only 30 years, and as millions of years pass, about the time fossils have been around, most if not all of any strontium would have decayed.
<span>C5H12 has only 3 isomers. They are pentane, butane and propane.</span>
Answer:
Nucleus stores most of a cell’s DNA...
Explanation:
because it is the control house of the cell..also...
The correct answer is B.element
