Members of the Porifera phylum have

a. no skeleton.

b. an exoskeleton.

c. an endoskeleton.

d. either an exoskeleton or endoskeleton, depending on the species.

The denser a liquid, the slower it flows. The table below shows the mass and volume of two different liquids Comparison of Liquids Volume Liquid Mass (9) (cm3) 13 Which of the two liquids flows slower Liquid Allows slower

For your organ system, describe how the system works at the organ level. (digestive system) : D

How does a ribosome know how to make protein A. The instructions come through a transmembrane protein and travel to the ribosome B. The necessary enzymes travel along the plasma membrane and are decoded in the ribosomes C.

Scientists tested the effect of a fertilizer on the growth of plants. They had 2 sets of plants, Group A which gets fertilizer, water and sun and Group B which gets only water and sun (but in equal amounts to Group A). 1.

The site where the old dna strands separate and new dna strands will be synthesized is called the

Which DNA bases pair with each other? How many hydrogen bonds are shared by each pair?

Which layers of sedimentary rock at Grand Staircase Escalante National Monument do you think are the oldest?

Animals in the higher trophic levels generally share two characteristics. They are typically

Name two ways that carbon enters the atmosphere

Omid is spending the semester in England where the road signs are in km. If he drives from his school into a town 6mi away, how many km will he drive?