Birds are evolved from reptiles, but also differ dramatically. Which features of birds differentiate them from most reptiles?
What will be an ideal response?
ANSWER: Birds have large eyes, comparatively larger brain, lightweight skeleton, feathers, flight
muscles, lungs that enjoy constant air flow, and a four-chambered heart (shared with
crocodiles).
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Which of the following statements about DNA profiles is false?
1.Individuals vary in the length of certain DNA sequences called short tandem repeats located at many different chromosomal sites. 2.Each locus can have dozens of alleles of short tandem repeats (STRs). 3.In the U.S., DNA profiles utilize a standardized set of 13 STRs. 4.STRs are amplified by PCR before Southern blotting and visualization. 5.Due to environmental influences, STRs differ slightly between identical twins. 6.Even very old samples of DNA can yield sequences that are appropriate for DNA profiling.
Answer the following statement(s) true (T) or false (F)
1. True or False: If Ca+2 levels in the blood are too low, hormones from the parathyroid gland can induce bones to dissolve and release calcium. 2. Animals with closed circulatory systems are more successful than animals with open circulatory systems. Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know evolutionary success? What other information is related to the question? Choose Answer Given what you now know, what information 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? 3. Since men produce millions of sperm, but women produce only one oocyte per cycle, in the vast majority of cases infertility is due to a problem with the woman. 4. The placenta protects the developing fetus from harmful substances like alcohol or drugs. 5. True or False: Haplodiploidy is necessary for eusociality.
Which of the following might be expected in the logistic model of population growth?
A) As N approaches K, b increases. B) As N approaches K, r increases. C) As N approaches K, d increases. D) Both A and B are true. E) Both B and C are true
the appendix is a part of the _____ intestine
What will be an ideal response?