Why are fossils rarely found in Precambrian layers

What is the difference between an embryo and a fetus?

The amount of energy passed from one trophic level to the next in the energy pyramid

What is algin? A. Diatomaceous earth used as an insulating material B. Brown algae C. A substance produced by brown algae used to thicken foods. D. Diatom shells

How many codons code for the amino acid arginine?

The two categories of controlled muscles are involuntary and: a: voluntary b: automatic

2) This is a process in which water moves through a membrane, from an area of high concentration to an area of lower concentration.

Severe combined immunodeficiency (SCID) : A. is a result of the absence of macrophages or B cells B. affects only part of the adaptive immune response. C. can be caused by failure of TAP transporters. D. can be caused by failure of VDJ recombination.

The enzymes used in all experiments in this lab was

Carbohydrates and lipids both contain carbon, hydrogen, and oxygen. How can you tell them apart by looking at the shape of their structures?

Piebald spotting is a condition found in humans in which there are patches of skin that lack pigmentation. The condition results from the inability of pigment - producing cells to migrate properly during development.