Sponges have no "true tissues." What does this mean?

Select one of the options below as your answer:

a. They perform body functions by diffusion.

b. They have organs for specific functions.

c. Similar cells do not cooperate together.

1. How has the human population size changed throughout history?

In photosynthesis what substances are produced

What is the most direct source of energy for cotransport?

When a biological vector is used, which process must take place before recombinant DNA can be placed in the host cell?

Some glucose produced by gluconeogenesis is stored in the body as glycogen. Order the steps of glycogen synthesis. Not all descriptions accurately describe glycogen synthesis; therefore

Drake is comparing time people spend playing games on Xbox versus Playstation. In his study, individuals ages 10 - 15 are given Xbox's and individuals ages 16 - 25 are given Playstations.

How do scientists obtain knowledge about the world? Check all that apply.

What would the temperature of the surface be if the Earth did not have an atmosphere?

How would the lack of water affect cellular respiration?

Different types of normal tissues in the human body have different mitotic indices. From the following list, which normal tissues would you expect to have the highest mitotic index: muscle, skin, kidney, or lung? Explain your answer.