The common feature shared by dinoflagellates, euglenids, green algae, and red algae is that they

a. all have chlorophyll.

b. all are multicelluar organisms.

c. never carry out photosynthesis.

d. all of the above

In an ecosystem can there be more carnivores than herbivore? Explain why or why not

Based on your calculations and the FBI Muzzle Velocity Table, what type of weapon was used to shoot Horation Leafbottom? Who should be arrested for this shooting?

The term used to describe the dry mass of living or once living organisms per unit area is

Sandra wanted to test the effectiveness of various kitchen cleaners, so she performed the following experiment. First, she prepared five agar plates with the same bacterial density (i. e., the same number of bacteria per plate).

Classify the responses in the given situations as part of innate immune response or adaptive immune response. A liver is transplanted from a donor to a recipient. Swelling occurs around the area of a scratch.

Tp-21 gasoline and propane fumes are most likely to accumulate in what part of the boat?

Differences between the process of aerobic respiration and fermentation

John places a dried bean with a mass of 1.50 g in a cup of water and allows it to sit overnight. The next day he takes the bean out and dries off the excess water and finds the new mass to be 1.85 g.

Which of the following statements is true? a) When you add heat to a substance, its temperature usually increases. b) When a substance gives off heat, its temperature increases. c) Heat and temperature are the same.

What kinds of changes in a cell do second messengers usually causes?