The process by which molecules such as oxygen are moved into cells along their concentration gradient directly through the cell membrane is called

An organism which is sensitive to an antibiotic is grown in the lab in a pure culture on a medium with the antibiotic, if we see colonies of the organism growing on the plate then it must have undergone A. transpoon muagenesis B.

Name the four levels of group organization of living things in order of increasing complexity

True or false some viruses have rna in place of dna

Which of the following is not a factor in determining population size? a. the food supply b. birth rate c. available niches d. detritivore activity

What adaptions allow lions to hunt at night?

In the lungs, oxygen diffuses into the blood and is loaded onto hemoglobin for transport. in the tissues, oxygen is unloaded from hemoglobin and diffuses from the blood into nearby cells. what drives the diffusion of oxygen?

Which of the following is flagellated cell which sweeps water through a sponge's body? a. choanocyte b. ameobocyte c. archaeocyte d. neuron e. chondrocyten

A biologist wishes to take a useful gene found in pine trees and introduce it into some bacterial cells. Her experimental procedure is given below. 1. Use a restriction enzyme to cut a gene out of the pine tree DNA. 2.

A large flock of endemic birds is discovered on a remote island. There appears to be two similar but different kinds of birds within the flock.

Which fruit can people at home use to prevent oxidation?