A biological agent that cannot reproduce on its own is a/an

Surface proteins that identify cells as pathogens are called

Lancelets and tunicates are two groups of chordates. classify each statement as applying to lancelets, tunicates, both lancelets and tunicates, or neither.

Which compound is produced during regeneration?

What type of rock is most likely to form at a transform boundary? A. Metamorphic rock B. Extrusive igneous rock C. Sedimentary rock D. Intrusive igneous rock (Apex)

What is one result of meiosis? A. a larger organism B. identical daughter cells C. repair of damaged cells D. formation of gametes

look at the ocean system below plankton, shrimp, salmon, human what will most likely happen if the plankton population decrease in this ocean systems? A. it will be more difficult for salmon to find food. B more shrimp will move into the area C.

Gloria wanted to find out if the color of food would affect whether kindergarten children would select it for lunch. She put food coloring into 5 identical bowls of mashed potatoes. The colors were plain, red, green, yellow, and blue.

Why was Copernicus's heliocentric model not believed until Galileo and Kepler provided more evidence?

Neurotransmitters (like acetylcholine) are required to conduct nerve impulses because the neurons do not physically touch each other or the cells on which they are acting.

The population size of a predator species is directly controlled by _.