B. Toad i believe that’s the answer not sure
Answer:
d)A...B...C
Explanation:
Hormones are chemical proteinous substances secreted in one location and transported to another location, in order to bring about a physiological effect. Hormones are secreted by endocrine glands which collectively makes up the endocrine system. Endocrine glands include testes, ovary, pancreas, thyroid, adrenal gland etc. A hormone is usually secreted when a change needs to be effected in a target cell.
What happens is that, when a particular physiological effect is needed by a target cell e.g growth, development, homeostasis, repair etc., it sends a negative feedback to the gland that is responsible for the secretion of the specific hormone. The particular endocrine gland, then, secretes the hormone into the bloodstream (ductless), which carries it for absorption by the target cell where it is needed.
1. 50% will have the RR phenotype and 50% will have the Rr phenotype.
2. 25% will be RR, 25% will be rr and 50% will be Rr
3. 100% will be rr
Answer:
In Darwinian terms, the fittest individuals of a species are those that attracts the most mates and leave the greatest number of reproductive descendants.
Explanation:
Darwin's evolutionary theory have mentioned "Survival of the fittest'' that described the mechanism of natural selection.
The survival of fittest means the maximum rate of reproductive success.
Those individuals that leaves maximum copies of it's offspring which are actively successful in reproduction and transmit it's features to the next generation are fittest individuals.
Charles Darwin mentioned this on his book'' Origin of species'' in 1868
Survival of fittest is the alternative form of natural selection.
Survival of fittest ensures the chance to improve phenotypic characters.
