The polynucleotide strands of DNA are linked along their length by ________ bonds between the bases.
A. covalent
B. Van der Waals
C. ionic
D. hydrogen
E. double
Answer: D
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Males of many marsupial species have forked penises that are incompatible with the anatomy of female placental mammals. What type of isolating mechanism does this represent?
A. ecological isolation B. temporal isolation C. mechanical incompatibility D. hybrid sterility E. prevention of gamete fusion 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 reproductive isolation? 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?
The whorl of a flower that consists of all the sepals is the
A. stigma. B. calyx. C. corolla. D. carpel. E. stamen.
Do humans exhibit r-selected or K-selected species patterns? Explain your answer. What will be an ideal response?
what does HIV do? (T-helper)
What will be an ideal response?