Why might it be beneficial to express genes only when they are needed

What would cause antibodies to attack the cells of the body? The cells support bacterial growth. The cells are worn out and need to be replaced. The antibodies mistakenly identify the cells as foreign material. The red blood cells are malfunctioning.

How does the sun supply living things with the energy they need?

Which intercellular communication type changes membrane permeability? A. Transmembrane Receptor B. Molecular Receptor C. Enzyme-linked Receptor D. Ion Channel-linked Receptor

In a plant cell, DNA can be found in? A. mitchondria B. the nucleus C. chloroplasts D. all of the above

When an organism has two of the same alleles for a trait it is said to be

Is the following genotype homozygous dominant, homozygous recessive, or heterozygous? Gg

As part of an experiment to measure decomposition rates of different materials, students put food scraps from the cafeteria in compost bin A and leaves and grass clippings in compost bin B for six weeks.

The arctic tundra can be found in

Brown bears gain weight during the summer months so they can hibernate during winter. is it adaptation or acclimation

Which is NOT true of lipids? Question 11 options: They are commonly called fats and oils. They are hydrophobic. They are good for energy storage. They are polar.