During which stage of meiosis does crossing over usually occur?

A. Prophase I

B. Metaphase I

C. Prophase II

D. Metaphase II

Phosphorus (P) often occurs as a waxy solid in its natural state. Ifyou subdivide a piece of phosphorus until you have the smallest concievable amount, do you end up with an atom or an element?

Identify an example of a structure created by deposition. A: Beach B: Rill C: Cave D: Geyser

What's up these organisms has an exoskeleton?

Which of the following is not a feature of the retina

What structure holds the individual chromatids together?

A lab technician observes a unicellular organism with two long flagella and two nuclei in the blood smear of a person. To which phylum does this protozoan belong? A. Zooflagellata B. Ciliata C. Sarcodina

Which is an example of a chemical defense in your skin? growing long hair shredding dead skin sweating palms developing calluses

Why is DNA ligase so Important in recombinant DNA technology

What is the diffrence of pulmanary artery and pulmanary veins?

Do scientists Know what is causing El Niño?