Why are there few fossils of animals that lack shells or skeletals structure

A scientist adds colchicine, a microtubule polymerization inhibitor, to a cell entering mitosis. At metaphase, the chromosomes of the cell were arranged as shown below. Explain why this arrangement is consistent with the application of colchicine.

What protein (purine) - rich food should be limited to prevent a reoccurrence of uric acid kidney stones?

Which of the following can be a stimulus for contraction in all three muscle tissue types? A) epinephrine B) thyroid hormone C) testosterone D) parathyroid hormone E) acetylcholine

Which might you study in a biology course? Question 11 options: communication across telephone wires communication over fiber optics communication by satellite communication among birds

4. How might similarities and differences in genetic codes, or the proteins built as a result of these codes, be used to determine how closely related different species are?

Which of the following you is a characteristic of all minerals

Which event marks the beginning of DNA replication? A) Formation of replication bubble B) Unwinding of DNA helix C) Formation of replication fork

After meiosis, how many chromosomes does each cell have compared to the original cell?

A client who is receiving total parenteral nutrition and lipids asks the nurse why the solution looks like milk. what is the most appropriate nursing response

What percent of the earths land area does north america cover