Certain bacteria live in plant roots and receive sugars from the plants. The bacteria provide a source of useful nitrogen for the plants.

This best describes which type of relationship?

A) parasitism

B) competition

C) mutualism

D) predation

Causas sobre la contaminacion acústica

A newborn foal stands up to nurse from its mother. Is this an example of an innate or learned behavior? A. innate B. learned

Considering the structural organization of the human body, which is the correct sequence from the most complex level to the simplest level of organization?

Name the subatomic particle that participates in chemical bond formation?

The effects of sunlight on the aquatic life inhabiting lake okeechobee

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 _.