Earthquake victims often are left without drinking water because

Plant reproduction by tissue culture differs from reproduction by meristem culture because A. tissue culture requires cells from a plant's root system, whereas any cell of a plant may be used for meristem culture. B.

While waiting for a prescription to be filled, Dan decides to measure his blood pressure using the automated machine in the pharmacy. His blood pressure reading is 140 over 92 millimeters of mercury.

Which provides the organelles, building blocks for compounds such as proteins and nucleic acids, and other necessary materials for the zygote? a. Sperm b. Egg c. Both the sperm and the egg d. None of the above

What would happen if oxygen wasnt available in the cell?

What type of division (meiosis or mitosis) does the diploid zygote of an animal have to go through (usually many times) in order to give rise to all of the cells in the adult body?

What can be expected if environment changes occur that favor a certain characteristic of an animal

Your biology instructor has assigned you a lab exercise to test a hypothesis regarding the inheritance of stem length in pea plants.

Which layer of skin is least protected by melanin?

A true-breeding purple plant and a true-breeding white plant cross-pollinate. The offspring will be

List the principal structures of the ventilatory system in the order that air passes from the atmosphere into the lungs