Which of the following changes take place as the muscle contracts?
A) The Z lines get closer together.
B) The H zones get smaller.
C) The I band gets smaller.
D) The A band gets smaller.
E) choices A, B, and C
E) choices A, B, and C
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Fungi are often capable of locomotion through the use of flagella
Indicate whether this statement is true or false.
Which of the following describes an example of how ocean acidification impacts aquatic communities?
A. Plankton cannot survive in overly acidic waters, so the shellfish that depend on their presence begin to die off as well, causing a chain reaction in the community. B. Shellfish over-calcify their shells, meaning those organisms that depend on them for food must find other food sources. C. Shellfish cannot reproduce in acidic waters, meaning their population sizes have decreased, negatively impacting others in the community that depend on their presence. D. Shellfish cannot calcify their shells, meaning they are at an increased risk of predation, negatively impacting others in the community that depend on their presence.
The approach to estimating phylogenetic trees is most like the approach of which species concept?
A) morphological species concept B) biological species concept C) phylogenetic species concept
Which of the following would NOT normally be found as a component of a cell's nucleic acids?
A) adenine deoxyribonucleotides B) thymine deoxyribonucleotides C) uracil deoxyribonucleotides D) cytosine ribonucleotides E) adenine ribonucleotides