Sperm cells must swim to the egg. what type of organelle must they contain? why?

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Explain how the political influence of african americans leaders became weaker.

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different