Lichens result from symbiosis between a fungus and
a. photosynthetic bacteria.
b. euglena.
c. photosynthetic algae
d. both (a) and (c)

In the african savanna,more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.

What is the next step in muscle contraction after the actin changes shape? (apex)