A dog gets many nutrients from its food including amino acids. Which of these can be built directly using the amino acids?
a. proteins
b. carbohydrates
c. lipids
d. minerals

One of the organelles in the eukaryote releases energy from sugars. What is this process called?
a. respiration
b. transpiration
c. photosynthesis
d. chemosynthesis

In a recent experiment, scientists studied the effects of increased carbon dioxide levels on the growth of pine trees. The scientists observed that increased levels of carbon dioxide resulted in an increase in the average circumference of the tree trunks.

Which of these is not a direct function of the skeletal system?
a. blood circulation
b. muscle attachment
c. support of the body
d. protection of the organs

Which of these structures transport water throughout the plant?
a. epidermal tissues
b. vascular tissues
c. chloroplasts
d. mitochondria

Which of these are the repeating units that form a DNA molecule?
a. fatty acids
b. nucleotides
c. amino acids
d. chromosomes

In the eukaryote, which of these organelles are used to make sugars?
a. flagella
b. ribosomes
c. mitochondria
d. chloroplasts

Elodea, a freshwater plant, releases gas bubbles when it is placed in direct light. In an investigation, a student placed a lamp at different distances from an aquarium containing Elodea. The student counted the number of bubbles produced by the Elodea pl

What is the primary role of the endocrine system?
a. to produce chemicals that affect other parts of the body
b. to remove waste products from the blood
c. to defend the body against illness and infection
d. to coordinate movement of the body

Many bacteria live in fresh water. Which of these statements best describes what will happen when freshwater bacterial cells are placed in salt water?
a. Water leaves the cell, causing the cell to expand.
b. Water leaves the cell, causing the cell to sh

Most carbohydrates in the human body are
a. used as building blocks for proteins
b. used as catalysts for reactions in cells
c. consumed as a source of energy
d. not easily absorbed into the bloodstream

Which cell structure contains molecules that direct cell activities?
a. nucleus
b. ribosome
c. mitochondrion
d. chloroplast

Elodea, a freshwater plant, releases gas bubbles when it is placed in direct light. In an investigation, a student placed a lamp at different distances from an aquarium containing Elodea. The student counted the number of bubbles produced by the Elodea pl

Which of these organ systems is responsible for the removal of metabolic wastes from the blood?
a. endocrine
b. nervous
c. respiratory
d. excretory

Starch turns blue-black in the presence of iodine solution. A selectively permeable dialysis sac containing a starch solution is placed into a beaker of iodine solution.
Which of these processes is demonstrated by the experiment shown in the diagram?
a. c

Glucose is a building block of carbohydrates. Which of these best describes glucose?
a. nucleotide
b. protein
c. monosaccharide
d. lipid

Some types of bacteria live deep in the ocean where sunlight cannot reach. These bacteria use the energy stored in inorganic molecules to make sugars.
Which of these processes do the bacteria use to produce sugars?
a. photosynthesis
b. chemosynthesis
c.

During photosynthesis, trees convert carbon dioxide and other materials to
a. lipids
b. amino acids
c. nucleic acids
d. sugars

Which of these body systems transports glucose and other substances in the blood to the cells of the body?
a. digestive system
b. endocrine system
c. circulatory system
d. reproductive system

In the early 1900s, many children had a disease called rickets. Research showed that the children had a deficiency of a vitamin that is necessary for the proper formation of bones.
Which of these vitamins was lacking in the diets of these children?
a. vit

Catalase is an enzyme found in plant and animal cells. Hydrogen peroxide is a harmful substance found in cells. Catalase causes hydrogen peroxide to break down into water and oxygen.
What type of molecule is catalase?
a. a lipid
b. a protein
c. a nuclei

Cyanide is a poison that prevents mitochondria from using oxygen. As a result, the mitochondria cannot produce
a. lipids
b. sugar
c. minerals
d. energy

A group of students separated 16 bean plants into four equal groups. They exposed each group to a different number of hours of light. The table below shows the amount of light each group of bean plants received. All other conditions were kept the same.
Wh

Which of these is an example of homeostasis in a multicellular organism?
a. inheriting a trait
b. growing larger and stronger
c. building a nest
d. regulating body temperature

A group of students studied the effect of light intensity on the rate of a cell process in Elodea plants. The students exposed Elodea plants to different light intensities. A gas was produced by the cell process. The amount of this gas was measured. The r