Actin and myosin are proteins that interact to produce movement in muscle cells. Would their genes be turned on or off in brain cells? explain

4. Some jellyfish have skeletons that are formed by fluid-filled compartments. This fluid resists compression and thus supports the body structure from deforming. Which term describes these skeletons? A. Fluid skeletons B. Hydrostatic skeletons C.

If a plant's stomata are closed and no transpiration is occurring, then

List at least three functions of a cell membrane.

Which of the following best describes the mechanism by which steroid hormones control gene expression? View Available Hint (s) Which of the following best describes the mechanism by which steroid hormones control gene expression?

Jenny is learning about the importance of the ozone layer. She was upset to know that there is a depletion of the ozone layer and human activities are adding to it.

What is the most likely cause of plate movement? A) radiation from the sun B) cold air currents on earths surface C) heat convection within the earth D) movement of ice sheets

The closer together a magnet's magnetic field lines are, a. the weaker the magnetic field. b. the stronger the magnetic field. c. the closer they are to the magnet's center. d. the closer they are to disappearing.

What are two things that carbohydrates and lipids have in common? A. Both contain C, H, O and N and are formed by dehydration snythesis. B. Both contain C, H, O and serve as a source of energy. C.

Stellar equilibrium is a balance between what two things? A. Outward and inward gravity. B. Outward pressure from light and inward pressure from heat. C. Outward pressure from hydrogen and inward helium. D. Outward pressure and inward gravity

Which genotype represents a homozygous dominant allele? HH Hh hh