Which portion of the brain is the main regulator of internal organs?
a. hypothalamus
b. cerebellum
c. cerebrum
d. thalamus
e. pons
A
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Which of the following is one of the differences between mitosis and meiosis?
1.Sister chromatids are attached only in meiosis, not in mitosis. 2.Cells end up with two copies of each chromosome at the end of mitosis, but with four copies of each chromosome at the end of meiosis. 3.Homologous chromosomes are separated in meiosis, while only sister chromatids are separated in mitosis. 4.When meiosis is finished, chromosomes have only one sister chromatid, while at the end of mitosis, chromosomes have two sister chromatids.
During glycolysis, phosphate groups are transferred to glucose from ATP. This process is called ____
a. ionization b. polymerization c. phosphorylation d. dephosphorylation e. anabolism
FSH stimulates interstitial cells in the testes to produce testosterone
Indicate whether the statement is true or false
An insectivorous bird has the choice of eating (1 ) meadow beetles, which are abundant and large but expose the bird to hawk predation, (2 ) under-a-rock beetles, which are large and fatty but hard to obtain, or (3 ) under-a-leaf beetles, which are easy
to obtain but small. The bird has nestlings to feed. As an optimal forager, it will A) concentrate on under-a-leaf beetles because they are easy and safe. B) concentrate on under-a-rock beetles because they are energy-rich. C) eat one kind of beetle at a time (first under-a-leaf, then meadow, then under-a-rock), switching to a new kind when the old kind becomes scarce. D) eat all three kinds of beetles, balancing the energy spent and the risks incurred against the energy gained.