When proteins are being produced by a cell, scientist say that the genes are ___.

Question 2 options:

activated

turned off

replicated

deactivated

Can the number of isotopes tell you the absolute age of a fossil? or does it tell you relative age?

Compare a large cell to a small cell in terms of the overall rate of nutrient intake and explain these differences.

In an ecological pyramid, what happens to energy, biomass and the number of species as you move up. why?

What characteristic of the semipermeable membrane determines which substances can pass through?

What happens to a virus that manages to cross the blood-brain barrier and enter the brain? ?

Which option is an advantage to using a parallel circuit? A. Parallel circuits use less wire. B. If one bulb goes out the others stay lit. C. Parallel circuits are a complex circuit.

What type of weathering can be considered the "rusting" of rock?

Which organism in an ecosystem is likely to be found at the top of an energy pyramid?

The - - - of a star determines its temperature and luminosity. A. density. B. mass. C. location. D. width

Name six kinds of seedless plants