If secondary consumers are removed from the food chain, how much energy will theoretically be available to tertiary

consumers?

a. 21 units of energy

b. 383 units of energy

c. 3,368 units of energy

d. 5,060 units of energy

Where is light penetration in a river or stream likely to be lowest? a. the source b. the mouth c. the middle portion d. none of the above

Certain substances pass from the blood in the glomerular capillaries into the ultrafiltrate under normal circumstances. Other substances will only appear in the ultrafiltrate under abnormal circumstances.

Chromosomes are made of tightly packed ___molecules.

Which granular leukocytes act as our body's bacteria killers and would dramatically increase in number during a bacterial infection? 1) basophils 2) lymphocytes 3) monocytes 4) neutrophils

Who is credited with first observing cells? Who is credited with first observing cells? Robert koch carolus linnaeus louis pasteur anton van leeuwenhoek robert hooke?

Name some proteins that are made at ribosomes.

Which describes organs in the human body? the largest living unit a group of cells that work together to perform a common function a group of tissues that work together to perform a common function the smallest living unit

Horses and donkeys can breed and produce sterile offspring known as mules. Horses and donkeys remain separate species because of this hybrid sterility, which is: 1. an allopatric barrier to reproduction. 2. a postzygotic barrier to reproduction. 3.

A group of cells working together is known as what

What do amoeba proteus, dinoflagellate, and euglena viridis have in common? a. they all can move and make their own food b. they all can move and use eye spot to locate food c. they all can move and be heterotrophic d.