What are the two main components of blood?

a. oxygen and lipids

b. plasma and red blood cells

c. platelets and white blood cells

d. vessels and capillaries

Define a biological community. explain why the study of community ecology is important

Ryan, an 8-year-old boy, has the habit of swallowing toothpaste. as a result, his teeth have become discolored. it can be said that ryan's teeth condition is caused by:

A good scientific theory is often

Which part of the graph would indicate a phase change is taking place

Which of the three macronutrients form the enzymes critical to the thousands of chemical reactions required to sustain life?

Arid and semiarid lands are prone to desertification because of

Which statement describes a situation that would reduce the stability of a forest ecosystem? (1) A fierce predator is removed from the ecosystem. (2) The number of producers remains constant in the ecosystem.

A scientist is studying a region of an ocean floor she discovers a long deep canyon that runs parallel to the coastline of a nearby continent what can she inferred from her discovery

Anson is 75 years old and has recently been experiencing a change in his personality. He is acting more impulsively and does not seem to care about his loved ones, to whom he has always been very devoted.

What is the best explanation if the gel of your PCR product shows smeared bands of multiple sizes? Select one: a. Non-specific gene amplification b. Primers hybridizing with one another c. Your isolate was not from a single bacterial colony d.