Grasslands never have trees

Which statement is true about the male reproductive system? The testes produce semen. Sperm cells are the largest component in the composition of semen. The scrotum functions to keep the testes at an optimum temperature.

What stem cell is most useful and is found in the blastocyst stage of the embryo

Many evolutionary relationships in the modern tree have only recently been determined due to molecular evidence from ... nucleic analyses protein analyses both of these neither of these

What are some Examples of physiological behaviors

These large bodies of water are covered with sand and rock, located inland, and usually fed by a stream. 1. pond 2. lake 3. cave 4. river

Are surface currents that flow towards the equator generally warm or cold?

Identify the following as part of active transport or passive transport. transport protein binds with the needed molecule a. active transport b. passive transport

Gametogenesis is the term for a. the fertilization of eggs. b. the development of polar bodies. c. the movement of sperm. d. the production of gametes.

Why is glucose needed for cellular respiration?

Which type of galaxy probably started as a different shape and then changed over time