In which type of wave does direction of the disturbance and the direction of the wave motion travel perpendicular to one another

Which form of cell transport allows small molecules to move from an area of higher concentration to an area of lower concentration without energy being required from the cell? A. osmosis B. pinocytosis C. phagocytosis D. simple diffusion

Which of the following happens when a cell divides? a. the cell's volume increases b. it becomes more difficult for the cell to get rid of wastes. c. Each daughter cell receives its own copy of the parent cell's DNA d.

Process by which a cell engulfs large particles as defense or for food

A subcutaneous injection in the hypodermal or subcutaneous tissue. based on structures found in the hypodermis and not in the epidermis, why is this a preferred area for administering an injection?

Interferons play a vital role in the immune system Why are interferons so important?

The role of a watershed is to ... a) purify water b) act as a drainage area c) collect fish from rivers and streams d) protect wetland areas

How would relaxing the smooth muscles in arteries affect blood pressure?

Is concentration of astmospheric carbon dioxide decreasing do to human activity

Why do viruses need living hosts, such as bacteria or eukaryote cells? (SB4c) A) The host cell is the source of food for the virus. B) Viruses depend on the host cells that they infect to reproduce.

The lac operon in E. coli controls the gene expression of the enzymes that digest lactose in the cell. In the absence of lactose, the lac operon will turn off and gene expression will be inactivated.