Answer:
C: Finch A has a large, sturdy beak; and Finch B has a thin, sharp beak.
Explanation:
Darwin's finches provide an ideal model for explaining evolution. Darwin observed the finches in the 10 islands that together made the Galapagos island. He observed that the finches had adapted their lifestyle and mannerisms according to their surrounding environment. He particularly noticed the structural differences in finches's beaks according to their feeding style. Finches who fed on nuts and seeds had large sturdy beaks so that they could break them open. Finches feeding on worms had thin sharp beaks so that they can easily pick up worms and kill them.
During fertilization, the pituitary gland secretes the follicle-stimulating hormone, which acts on the follicles and stimulates them to produce progesterone. The correct option is B.
<h3>What is fertilization?</h3>
Fertilization is defined as the union of two haploid gametes, the spermatozoa and the oocyte, also known as the egg, to restore the diploid state, form a zygote through the process of egg activation, and initiate a series of mitotic divisions that result in cell differentiation and embryo development.
During fertilization, the pituitary gland secretes the follicle-stimulating hormone, which acts on the follicles and stimulates them to produce progesterone.
If fertilization occurs, the fertilized egg attaches to the uterine lining and a placenta develops.
The fertilized egg then sends a signal to the ovary to continue secreting progesterone, which keeps the pregnancy going by keeping the uterus lining thick and nourishing for the developing embryo.
Thus, the correct option is B.
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Melatonin is the hormone secreted by Pineal gland in the brain
Answer: it is A.
Explanation: because they are both about the birds bones and birds need to fly if they don't have bones they can not fly