<span>are we talking human reproduction? in this case only 1 egg is implanted. in unusual cases there could be 2 eggs implanted meaning fraternal twins. if 1 egg splits, we get identical twins. with only one egg implanted, there is only 1 kid being produced.
the female has eggs stored from birth. 1 ovary 'pops' once a month to either be discarded via a period or implanted after fertilization. multiple eggs released is usually the effect of fertility drugs making many eggs get released at once. this is unusual unless fertility drugs are in use</span>
Answer:
banyan tree --- parrot--- crow--- parrot.
Answer:
a. Anabolism
b. Catabolism- A buildup of complex organic molecules from simpler ones is a catabolic reaction
c. Anabolism- The absorption of energy or use of energy in a chemical reaction
d. Catabolism- Energy is produced due to the raction that occurs
e. Anabolism - A breakdown of complex organic molecules from simpler ones is an anabolic reaction
f. Catabolism
Answer:
The correct answer is b. must be present in a population before natural selection can act upon the population
Explanation:
Genetic variation can be caused by mutation, recombination between chromosomes during meiosis and by fusion of two genetically different gametes during sexual reproduction.
This genetic variation is necessary for the evolution of any population. Natural selection acts on every individual and it decreases the frequency of those alleles that are not suited for the environment and increase the frequency of those alleles which helps the individual to survive in the changing environment.
Therefore genetic variation must be present in the population before natural selection act on the.
