For the common ancestor of all the Bilateria, what was the fate of the blastopore?

neither (N)

deuterostomy (D)

protostomy (P)

It is impossible to tell from the data provided.

Which statement best explains a difference between the interaction of light with clear glass and the interaction of light with silver metal?

Why do cells divide instead of just grow larger

What is the symbol for calcium? Cm Cl Ca C

How many people are predicted to live on Earth in 2050

How are molecules of sucrose held together to form a grain of sugar?

Colpidium colpoda is a unicellular eukaryote that lives in freshwater, eats bacteria, and moves by cilia (see Figure 6.23b). Describe how the parts of this cell work together in the functioning of C.

Which statements apply to density? Check all that apply. >Density is a chemical property of an object. >The density of an object is constant. >Density is a derived unit of measure. >Density is the sum of the mass and volume of an object.

For some invertebrates that live in water, the sense of taste and the sense of smell are identical. Why do you think separate organs for taste and smell might have evolved in animals that live on land but not in some animals that live exclusively in

Plants can only cause mechanical weathering. true or false.

Both Allison and Beth need 2,200 kcal daily to maintain their weight. Allison consumes a high-fat, high-protein, low-carbohydrate diet consisting of 2,200 kcal. Beth consumes a low-fat, moderate-protein, high-carbohydrate diet containing 2,300 kcal.