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Questions in biology

[Answered] The heart is an example of which level of organization within an organism? A. cell B. organ C. tissue D. organ system

[Answered] A population of squirrels lived together in a forest. An event occurred that caused the population to diverge into two different species over a long period of time. Which of the following is most likely the event that occurred? A. There was an increase in the predators in the forest. B. A natural disaster occurred that separated squirrels. C. The winters were unusually cold in the forest. D. A disease affected the squirrel population in the forest.

[Answered] 1. The membrane potential of any living cell is partially the result of: a) a transient increase in the membrane to sodium conductance b) a membrane that is leaky to sodium conductance c) a transient increase in the membrane to potassium conductance d) a membrane that is leaky to potassium conductance e) a membrane that is leaky to chloride conductance 2. During the depolarisation phase of an action potential.

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] How might an increase in the population of one species affect the populations of other species in an ecosystem?

[Answered] Which of the following properties of water is the result of strong forces of attraction between water molecules? A. Cohesion B. Specific heat C. Transpiration D. Adhesion

[Answered] The part of the nervous system that serves as an endocrine gland by directing the release of hormones that regulate the pituitary hormones is the:

[Answered] Which BEST characterizes the concept of drive states? A. We are motivated by survival instincts. B. We are motivated to keep a steady internal state. C. We are motivated to seek a stimulated state. D. We are motivated to be independent beings.

[Answered] Complex carbohydrates are comprised of which of the following? A. Disaccharides B. Oligosaccharides C. Polysaccharides D. All of the above

[Answered] Discuss the locations and importance of DNA and RNA.