What makes cells unique?

a. the amount of DNA

b. the cell cycle

c. the genes that are activated

d. the number of chromosomes

A species is a group of organisms capable of mating and producing offspring, and speculation is the process of forming a new species. One way a new species may form is by geographic isolation.

An invasive species is a non-native species that live in a region. Human activity has accidentally or intentionally introduced many invasive species into ecosystems.

Which of the following is a producer of pollution A) Forest B) Oceans C) Factories D) Bicycles

Compared with the hemoglobin of a person with sickle cell disease, normal hemoglobin is A. longer. B. shorter. C. more soluble.

An organism which is capable of moving around its environment is considered to be: a plant an animal possibly both not diagnostic

Which of the following types of compounds is unlike the other three A - Wax B - Saturated fat C - phospholipid D-polysaccharide

What predictions can researchers make based on the egg viability hypothesis?

What occurs after a disturbance in primary succession?

A person driving a car applies the brakes. This produces friction, which stops the car. Into which type of energy is the mechanical energy of the car converted

Why do our classification systems change?