Which of the following structures develops into a pollen grain?

a. Megaspore

b. Anther

c. Microspore

d. Archegonium

Primary infection by Mycobacterium tuberculosis in the mouth is common and present as an ulcer commonly found on the tongue. a. True b. False

Write the level of glucose in biological organization?

How far is the sun from the earth?

What is the key function of sphincters found along the digestive system? a. thet selectively allow and stop passage of partially digested food. b.

Active continental margins are characterized by which of the following? A. No sediment accumulation B. Sparse earthquake activity C. Shallow coastal waters D. Deep-sea trenches E. Broad continental shelves

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.