For a cell to maintain the appropriate balance of materials inside and outside of the cell, materials must be able to move in and out of the cell. The degree in which materials are able to flow freely through a cell's membrane is known as

What cellular structure must oxigen cross to get from the outside to the the inside of an animal cell? 1) the nucleus 2) the cytoplasm 3) the plasma membrane 4) the cell wall

What mechanisms might result in reproductive isolation? Group of answer choices Geographic separation Different mating times Anatomical incompatibility Different behaviors All of the above

Which summary below correctly describes what occurs during transcription? A. A DNA template is used to create an mRNA strand. B. An mRNA template is used to create a DNA strand. C. A DNA template is used to create a ribosome. D.

What happens to the size in each level in the idealized pyramid as energy is transferred through the trophic levels?

An infant's pulse rate is measured to be 121 ± 3 beats per minute. what is the percent uncertainty in this measurement?

Ths greenhouse effect is a result of

Which of the following statements regarding mercury is TRUE? Mercury is a mild toxin and produces no long lasting side effects. Small fish such as anchovies and sardines contain the highest amounts of mercury and should be avoided.

In vertebrate animals, brown fat tissue's color is derived from abundant blood vessels and capillaries. White fat tissue, on the other hand, is specialized for fat storage and contains relatively few blood vessels or capillaries.

Why must organisms eat? they eat to obtain potential energy stored in the chemical bonds. they eat to provide reactants for respiration to make atp. they eat to obtain the monomers of proteins, lipids, and carbohydrates constructed in organisms.

This was also called the War of Spanish Succession. a. King Williams War b. Queen Annes War c. Queen Victorias War d. King Johns War