Which of the following are parts in a feedback loop

a. sensory receptors

b. an intelligent center

c. effectors

d. all the above

Where is the major storage space for our biosphere's nitrogen

What is an erg? A. a moist area where erosion can occur B. an area of sand dunes C. an oasis D. a valley in a desert setting

The color of a person's eyes is determined by a single pair of genes. If they are both blue-eyed genes, then the person will have blue eyes;

What are microscopic openings in leaves that allow carbon dioxide to enter plat cells and oxygen to exit into the air

Organisms in which kingdom evolved first?

In Mendel's work with peas, an F1 hybrid (smooth yellow) was crossed to the recessive (wrinkled green) parent type. In terms of color, what were the frequencies of the phenotypes in the offspring of this cross?

Which of the following choices is a goal of sustainable practices? A. They focus on using resources for maximum productivity. B. They focus on using resources that can disappear if overused. C. They focus on using resources that can be renewed. D.

Why are atoms so important?

Which of the following is the best example of homeostasis in the human body? and why?

Dna determines the structure of proteins produce by cells?