This aquatic ecosystem may include protists
and bacteria as producers in a well-lit zone and
detritus feeders in a deeper dark zone.
a. estuary
b. stream
c. lake
d. coral reef
e. hydrothermal vent
C
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Answer the following statements true (T) or false (F)
1. Scientists developing drought tolerant plants can use the knowledge of relative water content as models for predicting how these plants will respond to stress. 2. If scientists want to develop plants that can withstand cold conditions they would breed for the ability of the plant to increase solutes in cells. 3. One possible explanation for the reason water can be transported up the vessels in plants is because of adhesion of water to the lignified walls. 4. Given the same driving force, water transport in vessels is more rapid than that in tracheids because of the end wall perforation of vessels. 5. Liquids move faster in plant cells by bulk flow than by diffusion.
The respiratory pigment you would find in a blue crab or octopus is
A. hemocyanin. B. hemoglobin. C. hemophilin. D. ferritin. E. calmodulin.
The sweetener aspartame is a known excitotoxin. With regard to nerve cells, ingestion of this substance results in chronic nerve stimulation. With your knowledge of action potentials, this toxin must
A) stimulate continual impulses at the cell body. B) stimulate continual impulses at the dendrite. C) bind the nodes of Ranvier. D) block the synaptic cleft. E) stimulate continual impulses at the presynaptic receptors.
What conditions may trigger reactivation of latent herpesvirus infections?
A) co-infection with hepatitis D virus B) major hormonal changes C) immune suppression D) co-infection with hepatitis D virus along with hormonal changes E) immune suppression or hormonal changes can both trigger reactivation