Suppose that enzyme X catalyzes a reaction that involves the breakdown of a substrate. The product of this reaction is an amino acid. What is the enzyme's substrate?

What discovery would weaken the primordial soup hypothesis of the origin of life? Lightning was common on early Earth. Earth's early atmosphere contained carbon dioxide, water, and trace gases. Earth's early oceans were warm and shallow.

Which statement illustrates how human activities can most directly change the dynamic equilibrium of an ecosystem? Water pollution causes a decrease in fish populations in a river. A hurricane causes a stream to overflow its banks.

Which cellular component is instrumental in maintaining homeostasis

Tissue cultures (samples of cancer cells) are taken from cancer patients, and the cells are then grown in a laboratory. What is the purpose of growing cancer cells in a laboratory?

Which of the following statements about grey matter is true?

Oil spills often kill many plants and animals in the affected area. What is the consequence of these mass die offs? Increased biodiversity Increased speciation Reduced biodiversity Reduced speciation

Why is it necessary to absorb some food molecules by active transport

Mountain lions are large cats and the top predator in their habitat. A population of mountain lions may vary in several characteristics. If prey becomes more scarce, which variation would provide an advantage to the individuals that possessed it? A.

List the genetic disorders found on chromosome

when biologists wish to study the internal ultrastructure of cells, they can achieve the finest resolution by using a