Which one of these exhibits gill slits at some stage of its development?

A. all echinoderms

B. all mollusks

C. all cnidarians

D. all chordates

A theory is an idea that is accepted as being true with a high level of certainty. Question 4 options: True False

In order for speciation to occur, what is needed

The process by which radioactive materials that have been incorporated by biological functions into the body tissues and organs are eliminated from the body as are their non-radioactive counterparts is referred to as?

If you are relating the levels of organizations the human body to the levels of organization of a city, what would relate cells to?

The cycle of heating, rising, cooling and sinking is called a

If the plankton contain 100,000 kcal of energy, about how much energy will the manta ray obtain from eating the starfish? A 10 kcal B 100 kcal C 1,000 kcal D 10,000 kcal

A population is growing exponentially what can you conclude

What is described in the following equation? 2H2 (g) + O2 (g) → 2H2O (l) A. helium gas combining with oxygen gas to form water B. hydrogen gas combining with oxygen gas to form water C. hydrogen gas combining with water gas to form hydroxide D.

During the polymerase chain reaction, the two DNA strands are separated at 95°C, after which the reaction mixture is cooled to 54°C to allow the primers to hybridize to the DNA strands.

Which of the following describes a benefit of membership in research community?