Answer:
d. They are often keystone species
Explanation:
Top predators in an environment are the largest predators and sits on the top (apex) of the food chain in an ecosystem which do not have any natural predators.
As the top predators relative to its abundance has disproportionately large effect on its natural environment, they are the keystone species most of the time.
Hence option d. They are often keystone species is the right option.
Answer: C. DNA polymerase joins nucleotides in one direction (5' to 3')
Explanation: DNA polymerase joins nucleotides in one direction (3' to 5')
Protein. im absolutely certain
B. Evaporates
Evaporite is the term for a water-soluble mineral sediment that results from concentration and crystallization by evaporation from an aqueous solution.
C. Mammary gland. Hope this helps!