Which combination of alleles are always involved in the inheritance of a sex-linked trait?

What are two reasons for why a species might disappear from the fossil record?

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air

Drag each description to the correct location on the image. not all descriptions will be used. describe the parts of a comet. the frozen part of the comet the atmosphere of gases and dust formed when the nucleus vaporizes tail made of small, solid dust particles tail made of ions that appears to point away from the comet's orbit