Explain why carbon-14 is found in the tissues of all thing things.

What structure is common in all 6 kingdoms of living organisms?

Consider a rabbit, which of the following is true regarding its DNA? A) All of its cells contain the same DNA. B) Each cell type contains its own unique DNA. C) Rabbit brain cells and kidney cells express the same DNA genes.

Company develops a new weed-killing chemical. When the chemical is first used, it kills nearly all the weeds. Which statement explains why after 10 years, nearly all the weeds can tolerate the chemical and survive? A.

Which type of algae is called seaweed and belongs to the division phaeophyta? brown algae red algae blue-green algae green algae?

What is required for reactions to form bonds?

How do enzymes catalyze chemical reactions (don't just say "they lower the activation energy", give me specific mechanisms) ?

What must happen before the cell can go through mitosis? Interphase.

Belle's grandfather lives in a region where the temperature drops below 0*F at night. When belle visited her grandfather, they hiked up a hill. Belle noticed that a lot of rock had cracks in them.

The genetic condition of an organism that has two identical alleles for a given trait.

Which level of biological classification is the lowest level that butterflies