Provide evidence that supports the hypothesis that liverworts were the first land plants
What will be an ideal response?
ANSWER: Both molecular and fossil evidence support the hypothesis that liverworts were the first
land plants. Mitochondrial gene sequence data show that liverworts lack several introns
that are present in all other bryophytes and in vascular plants. A recent fossil discovery in
Argentina, five morphologically distinct types of liverwort spores in rocks dated to 472
mya, suggests that even then, liverworts had been diversifying for millions of years.
lar and fossil evidence support the hypothesis
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Why is solar energy considered to be a better option in mitigating climate change?
A. Solar energy is not considered to be a better option for climate change mitigation. B. They absorb greenhouse gases, preventing them from causing heat to be trapped in the earth's atmosphere. C. It releases far less carbon dioxide into the atmosphere compared to burning fossil fuels. D. They absorb the sun's rays, preventing them from heating up the earth.
In saltatory conduction, the membrane is depolarized only in the region of the myelin sheath
____________________ Indicate whether the statement is true or false.
Arrange the events of muscular contraction in chronological order
1) muscle shortens 2) calcium binds to troponin 3) filaments slide 4) T tubules are depolarized 5) acetylcholine is released 6) ATP molecule is split a. 4 ? 5 ? 2 ? 1 ? 3 ? 6 b. 4 ? 2 ? 5 ? 6 ? 1 ? 3 c. 5 ? 2 ? 4 ? 1 ? 6 ? 3 d. 6 ? 1 ? 5 ? 4 ? 3 ? 2 e. 5 ? 4 ? 2 ? 6 ? 3 ? 1