Thorium 234 has a half life of 24 days. If you started with a 100-g sample of thorium-234, how much would remain after 48 days?

A cross between two squash plants that produce yellow squash results in 124 offspring: 93 produce yellow squash and 31 produce green squash. What are the likely genotypes of the plants that were crossed? A. one YY, one Yy B. both yy C. both YY D.

Which of the following best describes the following characteristics: water storage, energy, and flood prevention?

A Lipid in which carbon atoms are bonded to as many hydrogen atoms as possible is called: A.) Phospholipids B.) Polysaccharides

Describe three main features inside a prokaryotic cell?

When energy is lost in trophic levels it is lost as: a. chemical energy b. heat energy c. kinetic energy d. mechanical energy

What is wrong with the cellular respiration equation?

What is involved in the synthesis of a new molecule?

As rescuers in a population becomes less available. the population

A mutation that results in a single amino acid substitution in the active site of an enzyme A) may alter the ability of a noncompetitive inhibitor to bind to the enzyme. B) may alter the ability of an allosteric regulator to alter enzyme activity.

What is 2 + 3/4 * 3