What causes asteroids, meteoroids, and comets to orbit the Sun?

A.

electromagnetic attraction

B.

gamma radiation

C.

gravity

D.

heat

What evidence suggests that the inner mitochondrial membrane has evolved from a bacterial plasma membrane?

Organisms that can interbreed and produce fertile offspring are ... A. living in different niches B. members of the same species C. evolved populations D. homologous to each other

Name two biotic and abiotic factors you might find in a forest ecosystem

In which biome would you most likely find plants that are adapted to survive in hot, dry climates? A. Rain forest O B. Taiga C. Desert D. Tundra

An organism will survive if it is adapted to its environment. What is the name for this process? O O A. Natural selection B. Extinction O C. Disturbance O D. Predation

How might damaged alveoli affect the o2 level in the blood

The electrons of an atom occupy one or more areas of space called

The nucleus and other organelles of a neuron are primarily housed in which part of the cell? axon dendrite glial cell cell body none of the choices is correct.

What does every letter of the mRNA strand correspond to? (there is no chain to go with this question)

Is Sirius B brighter or dimmer than the sun?