During prophase I of meiosis, crossing over between the sister chromatids occurs. What is the purpose of this process? To produce genetic variation.
To duplicate the DNA.
To produce the spindle fibers.
To remove the nuclear envelope.

A,t,g,c are the bases found in rna? o true false

How is geothermal energy transferred from nature to human use?

Refer to this portion of a dichotomous key to answer the question.1. (a) has a single dorsal fin  ®  5          (b) has a double dorsal fin  ®  25. (a) has a small fin on back near tail  ®  6          (b) has no fin on back near tail  ®  76. (a) has barbs near the mouth  ®  catfish          (b) does not have barbs near the mouth  ®  107. (a) tail is asymmetrical  ®  sturgeon      (b) tail is symmetrical  ®  8what would the result be when identifying a fish with a single dorsal fin, no fin on its back near the tail, and a tail that is asymmetrical? sturgeongo to step 8go tp step 2catfish.mark this and return