When describing food webs, the term "everything is connected to everything" is fitting. Why?
a. Decomposers break down organic material from all organisms.
b. Animals in an ecosystem share resources.
c. Producers are always at the first trophic level.
d. Each species in a food web is typically two links away from all other species.
e. Extinction of any species in a food web has a very low potential impact on other species.
d
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Aside from using light as a source of energy, another important part of the functional diversity of some bacterial phototrophs is their ability to
A) bioluminesce. B) form prosthecate and stalked cells. C) fix nitrogen gas. D) degrade neurotoxins.
Which of the following correctly lists components of extracellular matrix found in plants?
A. collagen, laminin, and elastin B. collagen, lignin, laminin, and pectin C. lignin, pectin, and keratin D. cellulose, pectin, lignin
The specific heat of water is
a. a gram of substance. b. energy required to raise a gram of substance 1? F. c. calories need to heat seawater. d. energy required to raise a gram of substance 1? C. e. energy required to evaporate 1 gram of liquid water.
What is meant by "semi-conservative replication"?
What will be an ideal response?