What is the role of B cells in the human immune system?

Scientists studying a group of related bird species on an island archipelago discover that these species are always more closely related to each other within an island than they are between any two islands.

Which usage of water uses the least amount of water in a year in the United States? A. public water supply B. livestock C. irrigation D. industry

Banking stem cells is a very popular practice in science. This is when stem cells, located in the umbilical cord of a birthed infant, are saved and frozen.

Mendel's law of independent assortment has its basis in which of the following events of meiosis I?

How do cells in animals get energy?

Two types of chemical bonds are

This refers to a set of research and development of technology initiatives occurring between the 1930s and the late 1960s that increased agricultural production worldwide, particularly in the developing world, beginning most markedly in the late

Why is it that steroid hormones use receptors inside of target cells, whereas protein, peptide, and amino acid hormones do not?

For the hydrolysis of atp to adp + i, the free energy change is - 7.3 kcal/mol under standard conditions (1 m concentration of both reactants and products). in the cellular environment, however, the free energy change is about - 13 kcal/mol.

Ribosomes are composed of rRNA and what other component? protein carbohydrates DNA mRNA