24. The use of both pollen and spores in forensic studies is based on: a. Baird's principle of exchange.
c. Lockhart's principle of exchange.
b. Locard's principle of exchange.
d. None of these choices.

Four types of motile cells in human body?

How can you approximate the number of calories required to keep you in energy balance?

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them