For diffusion to occur, there must be:
a) a membrane
b) a gradient
c) water
d) ATP
d) all of these

Water loss through the stoma of leaves is termed...
a) Transpiration
b) Translocation
c) Guttation
d) Osmosis

A population of deer was threatened with overpopulation until cheetahs were imported. After a couple of years there were fewer deer but the average running speed of the deer had increased.
This is an example of:
a) induced mutation
b) genetic drift
c) mut

A complex interrelated network of organisms and the surrounding abiotic environment in a defined area is a(n) ..
a) Community
b) Ecosystem
c) Population
d) Biosphere

Approximately 99% of blood cells are involved in
a) immunity
b) transporting oxygen
c) eating invaders
d) entering and leaving the blood stream

Which statement is true of cell walls?
a) Cell walls are nonliving
b) Cell walls are secreted by the cells they surround
c) Bacteria, fungi, and some protists possess cell walls
d) All of the above

The movement of water and minerals through xylem is explained by the:
a) Pressure flow theory
b) Translocation theory
c) Cohesion- tension theory
d) Assisted diffusion theory

Darwin and ________ both jointly proposed the theory of evolution by natural selection.
a) Fitzroy
b) Malthus
c) Lamarck
d) Wallace

In the process called _______________ , species act as agents of natural selection on each other.
a) Succession
b) Commensalism
c) Competition
d) Coevolution

__________ is a waste product of cellular respiration
a) ATP
b) Oxygen
c) Carbon dioxide
d) Glucose

The process whereby white blood cells engulf bacteria is termed:
a) Adhesion
b) Exocytosis
c) Pinocytosis
d) Phagocytosis

The sporophyte produces..
a) Spores by mitosis
b) Spores by meiosis
c) Gametes by mitosis
d) Gametes by meiosis

Darwin and Wallace both realized that most species produce many more offspring than is necessary to maintain a constant population. What is the fate of the excess individuals?
a) Evolution kills them off
b) The more favorable reproduce more than less favo

A species that plays a major role in determining the structure of its ecological community is :
a) A predator
b) A dominator species
c) The most abundant species in the community
d) A keystone species

Closed air sacs
a) Trachea
b) Alveoli
c) Bronchi
d) Larynx

Aerobic metabolism occurs in the:
a) Ribosome
b) Chloroplast
c) Mitochondrion
d) Nucleus

In an alternation of generations life cycle(ferns, for example) what alternates?
a) Male plants and female plants
b) Reproductive plants and vegetable plants
c) Eggs and sperm
d) Sporophytes and gametophytes

Which of these statements indicated a problem with the theory of catastrophism
a) Not all species have been recovered
b) Many species become extinct
c) The Earth is billions of years old
d) There are no humans in early fossil records

Which of the following is NOT involved with the nitrogen cycle?
a) Limestone
b) Fixation
c) Calcium carbonate
d) Decomposers

Which of the following secretions does NOT contain enzymes?
a) Intestinal wall secretions
b) Bile
c) Saliva
d) Gastric secretions

A cell adapted for waste storage and disposal would probably contain a large number of:
a) Mitochondria
b) Vacuoles
c) ER
d) Nuclei

The earliest seed plants are thought to be the ..
a) Gymnosperms
b) Flowering trees
c) Angiosperms
d) Tree ferns

Which example is favored in terms of natural selection?
a) a woman who lives 25 years and has 6 children
b) a woman who lives 105 years and has 2 children
c) a woman who lives 35 years and has 4 children
d) a woman who lives 50 years and has 5 children

Nearly all of the incoming solar energy to the earth's surface is returned to space as
a) infrared radiation
b) light
c) both a and b
d) reflection

Human kidneys are located
a) On each side of the esophagus
b) In the chest cavity
c) Around the level of the waist
d) Below the large intestine