The "Southern Beech" tree is found in such diverse places as Australia, South Africa, and South America. People did not transplant it. How did it probably get to these widely separated locations?
A) The simultaneous creation of the same species occurred in different geographic locations.
B) Seeds were carried by birds.
C) Seeds were blown by the prevailing winds.
D) Glaciers split what was once a continuous, huge population of beeches.
E) These landmasses were once connected and later drifted apart.
E
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A cell biologist examines a skin cell from a lizard during metaphase of mitosis and determines that 20 chromatids are present. The role of meiosis in this species is to (Check all that apply)
_____ Produce 4 daughter cells that are genetically different from each other. _____ Produce 4 daughter cells that are genetically different from the original parental cell. _____ Reduce the number of chromosomes per cell from 10 to 5. _____ Reduce the number of chromosomes per cell from 20 to 10. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about meiosis? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
No cases of attenuated polio virus reverting to a neurovirulent strain have been documented.
Answer the following statement true (T) or false (F)
Which of the following shows Chargaff's equivalence?
A) RNA B) single-stranded DNA C) histones D) double-stranded DNA E) deoxyribose
Which of the following does not belong?
a. Polysaccharides b. Nucleus acids c. Lipids d. Proteins