Answer the following questions true (T) or false (F)
1. Ecological dominants are always the most abundant members of a community.
2. Because their absence may have negative repercussions for population control and resource use for the whole community, lions on the African savanna are identified as a keystone species.
3. To be a keystone species, an organism must be the most numerous species in an environment.
1. TRUE
2. TRUE
3. FALSE
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Which of the following is not a function of the signal recognition particle (SRP)?
A. halts translation B. binds to the ribosome C. binds to the channel in the rough endoplasmic reticulum D. targets certain proteins to be synthesized on the rough endoplasmic reticulum
When you bring your hand to your shoulder, your biceps muscle ____ and your triceps muscle ____
a. contracts; relaxes b. relaxes; contracts c. contracts; contracts d. relaxes; relaxes e. lengthens; shortens
The diffusion of water molecules across a selectively permeable membrane is called
A) facilitated diffusion. B) exocytosis. C) active transport. D) osmosis. E) hydrolysis.
Briefly explain how the body's first line of defense against pathogens works
What will be an ideal response?