Which is true about autotrophs?

a. They are primary producers

b. They make their own food.

c. They are the base of the food chain.

d. All of the choices are true.

A girl who weighs 30 kg is inline skating at a speed of 5 m/s. what is the girls kinetic energy

What terminates a muscle contraction?

How do vesicles move inside of a cell? a. By concentration gradient b. By diffusion c. They are carried by motor proteins using the cytoskeleton as a "roadway" d. They are carried by motor proteins "swimming" through the cytoplasm

The skeletal system of animals provides structure and support. Which cell part provides a similar function in the cell? A. pili B. Golgi apparatus C. Cell membrane D. Large central vacuole

Which best summarizes the concept of natural selection? A. an organism will always adapt to its environment B. a mutation always makes a species fitter C. the fittest organisms survive and reproduce D. an organism will always mutate to survive

Two alternative futures for cells when they reach their size limitation

What do unicellular organisms do to maintain homeostasis?

Which of the following units of length would be most appropriate for measuring the distance between Los Angeles and Las Vegas? a. centimeter b. millimeter c. kilometer d. meter

What will change if you permanently increase the extracellular K + concentration? (more than one answer is possible) a. the amplitude of action potential b. the resting membrane potential c. the membrane capacitance d.

Cnidrians representative organism