Why are there limited levels of consumers? For example, apex predators are usually tertiary or quaternary consumers. Why don't we have many 5th, 6th, or 7th level consumers?

The kangaroo rat is able to get all of the water it needs through its food and, therefore, never needs to drink liquids. this animal has adapted to survive in which biome?

There are three type of cancer treatments: surgery to remove cancerous tissue, chemotherapy, and radiation. Which treatment would Paclitaxel fall under

Select examples of energy changing forms. Select the THREE answers that are correct. (A) From a high perch, a raptor dives toward its prey. (B) An animal has stores of lipids in its fatty tissues.

What is the main function of the circulatory system in multicellular organisms? A. to bring oxygen into the lung B. to put carbon dioxide into all blood vessels C. to expel waste products from the body D. to transport materials throughout the body

Where does the energy come from to make ATP at the chloroplast? A) From the potential energy of hydrogen ions stored inside the thylakoid B) From photons from the sun as they strike electrons in chlorophyll C) From the kinetic energy of hydrogen

What has to be properly functioning in a unicellular organism for homeostasis to be maintained.

How many cells make up a unicellular organism? one two three more than three

The researcher thinks the changes in data are a result of selection. Do you think directional, disruptive, or stabilizing selection is occurring? How does your data support this conclusion?

Which of the following is a valid reason why a scientist might reject a scientific theory?

Do pathologists take blood from the heart to check for bacteria in the blood?