The sperm structure that helps penetrate the egg cell is the ________
A) ATP B) midpiece C) acrosome D) tail
Answer: C
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A cell biologist examines a diploid cell from a particular species of butterfly during prometaphase of mitosis and determines that 10 centromeres are present. Based on this finding, how many chromatids should be present in a single cell from this species in metaphase I of meiosis?
What will be an ideal response? 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 the number of chromatids in a cell? 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?
Stem cells divide and become immunocompetent.
The fungus that produces penicillin belongs to which of the following groups?
A. ascomycetes B. basidiomycetes C. chytrids D. glomeromycetes E. zygomycetes
Where is the majority of DNA located in a human cell?
nucleus mitochondrion chloroplast ribosome