The sperm structure that helps penetrate the egg cell is the ________

A) ATP B) midpiece C) acrosome D) tail


Answer: C

Biology & Microbiology

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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?

Biology & Microbiology

Stem cells divide and become immunocompetent.

Biology & Microbiology

The fungus that produces penicillin belongs to which of the following groups?

A. ascomycetes B. basidiomycetes C. chytrids D. glomeromycetes E. zygomycetes

Biology & Microbiology

Where is the majority of DNA located in a human cell?

nucleus mitochondrion chloroplast ribosome

Biology & Microbiology