A student observes a leaf epidermis under a microscope. it has many stomata but they all appear closed. this epidermis was most likely from:

What is an organism's niche? a. The range of physical and biological conditions in which an organism lives and the way in which it uses those conditions. b. All the physical and biological factors in the organism's environment. c.

What force holds the two ions together in an onie bond!

Erosion affects what types of land forms?

Proteins carry out a variety of functions, and their function is critically dependent upon their structure and shape. enzymes are proteins.

A reaction occurs when solid X is placed into solution Y. As a result, the temperature of the new solution increases by 3°C. The temperature rises another 2°C when more of solid X is added to the solution.

Which location would most likely hold autotrophs that derive their energy from chemical compounds? Question 12 options: swamp sediments antarctic pools grassland soil surface desert rocks

About four or five days after fertilization, a group of cells forms a ball-like structure. What is the name of this structure? A. Heart B. Placenta C. Blastocyst D. Stem Cell

Which of the following is the best definition of a scientific theory? A. a broad, well-supported explanation of related observations or events B. a description of a natural phenomenon that is always observed to occur under specific conditions C.

Consider a small protein containing 101 amino acid residues. the protein will have 200 bonds about which rotation can occur. assume that three orientations are possible about each of these bonds.

Where would i find the nucleus?