According to piaget, at what age will most children enter the concrete operations stage of cognitive development?

a. between the ages of 4 and 6

b. usually by age 2

c. by age 12

d. by age 7

Tan mice lived in regions with sandy hills. Over time, many of these tan mice migrated to a region with dark-colored hills. Eventually, the mice developed certain mutations in the trait for hair color, which made them black.

What are the two groups called that make up the naming system?

In mice, the LD50 for staphylococcal enterotoxin is 1350 ng/kg, and the LD50 for Shiga toxin is 250 ng/kg.

What happens when the number of organisms in an environment is higher than the carrying capacity? O A. The population will increase quickly. O B. The population remains the same. O C. The population will decrease. O D.

Life insurance is NOT used for: a) Burial expenses b) Investing in the stock market c) Providing for dependents

Suppose a bolt of lightning starts a fire in a forest. The fire sweeps through the forest and burns away accumulations of brush and deadwood. What is the most likely effect of the fire on the forest community?

What impact does 2-d diversity have on a company?

How can acid rain affect biodiversity in a pond?

Which of the following would be categorized as a cultural ecosystem service of forests?

Natural selection can lead to formation of a new species which is called?