Neurotransmitter molecules are removed from a synapse by

a) being abosorbed by adjoining muscle tissues

b) being broken down by enzymes

c) being reabsorbed by the presynaptic neuron

d) both (B) and (C)

A sperm cell and an egg cell fuse to form which structure? a. fetus b. gamete c. zygote d. stem cell

Which of the following can increase genetic variation during meiosis

Select the correct statement describing feedback control in animals. a. An animal may be a regulator for one environmental variable but a conformer for another. b. Ectotherms are regulators with respect to temperature. c.

A 14-year-old male and his mother are in the office for a annual visit and his mother jokes openly in front of the nurse about the changes in her child's voice and the hair under his armpits.

Predatory fish that swim in the water column, usually have what kind of coloration? disruptive counter shading cryptic fusiform

The greenhouse effect is related to the increase in average surface temperatures known as

Which of the following is true about spring tides but is not true about neap tides? they must occur during a new moon in spring they occur during the moon's first quarter and third quarter phases they only occur during a full moon they can occur

Animal cells are bathed in an isotonic fluid, and plant and bacteria cells have a cell wall. What does this protect the cell membrane from?

Explain why latin is the basic for many scientific names

What is incomplete penetrance and what causes it? incomplete penetrance means the heterozygote has an intermediate phenotype between the two homozygous phenotypes because of interactions with environmental factors.