If the thyroid gland is unable to produce iodinated thyroglobulin, what is the effect on hormone production?
a) triiodothyronine (t3) and thyroxine (t4) production continues uninterrupted.
b) excess triiodothyronine (t3) and thyroxine (t4) hormones are made.
c) less triiodothyronine (t3) and thyroxine (t4) hormones are made.
d) less thyroid-stimulating hormone (tsh) is made.

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction.

Which of the following explains why a tree is often used as a model to represent the principle of common descent