Greenhouse climate on earth was associated with relatively high atmospheric levels of which gas?

a. nitrogen

b. water vapor

c. oxygen

d. carbon dioxide

What substances are secreted by the oral cavity of humans that aid in digestion?

Match each cell organelle with its description

Which is not a cause of evolutionary changes in organisms? 1. Environment 2. Biologist 3. DNA 4. Cells

How do organisms living in the Marianas Trench get the energy they need? Sunlight reaches there and producers use photosynthesis in order to generate glucose necessary for cellular respiration.

Humans take in the energy they need to survive through which body parts

nitrogen fixation occurs in some types of sugar cane, a crop grown in Florida. how does nitrogen fixation benefit the sugar cane plant

If nondisjunction occurs and an individual survives, which disorder can occur? Klinefelter syndrome fragile X syndrome DiGeorge syndrome Robertsonian translocation

Which structure in the kidneys' nephrons is mainly responsible for the filtration of the blood? A. collecting duct B. loop of Henle C. glomerulus D. Bowman's capsule

What is the most detailed definition of reproduction?

You are walking along and you see a plant that is small, green, and growing close to the ground. when you look more closely, you see it has a very flexible stem and leaf like structures that lack veins. you are most likely observing a (n)