Answer the following statements true (T) or false (F)
1. Tiktaalik is an important fossil for the understanding of phylogeny because it is an intermediate form between fish and amphibians.
2. The formation of feathers, hair, and reptilian scales is based on completely different developmental patterns and genetic influences.
3. The first truly bipedal primates were the australopithecines.
4. Our species, Homo sapiens, had been in existence for approximately 1,40,000 years when it moved out of Africa and replaced Homo neanderthalis, another species of human, about 30,000 years ago.
1. TRUE
2. FALSE
3. TRUE
4. TRUE
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Why might the different species of whales fail to recover even though hunting has been banned?
A. loss of genetic diversity B. loss of habitat C. introduction of invasive species D. increasing predation E. increased disease spread due to edge effects Additional: Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about genetic diversity? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Which gas or gases bind to hemoglobin more strongly than oxygen?
a. carbon monoxide only b. carbon dioxide only c. nitrogen only d. both carbon dioxide and carbon monoxide e. both carbon dioxide and nitrogen
Which of the following organs have epithelial
lined passageways and ducts that are affected in cystic fibrosis:
a. lungs b. liver c. pancreas d. intestines e. all of these organs are affected
Which clinical feature in a newborn baby girl suggests the possibility of Turner syndrome?
A. Absence of Babinski reflex B. Presence of a webbed neck C. Presence of epicanthal folds D. Absence of irises of both eyes