Which word describes the allele for green eyes?

B = alleles for brown eyes; g = alleles for green eyes

A. homozygous

B. dominant

C. heterozygous

D. recessive

A ball is tied to a pole with a rope and is moving in a circle with constant speed.

Which of these statements about the ball is true?

A. Force is acting away from the center of circle.

B. Force is acting at a tangent to the circle.

C. There is no acceleration.

D. There is force acting toward the center of circle.

Which statement regarding ball and socket joints is true?

A. Ball and socket joints are multi-axial joints, which are highly mobile, allowing movement in multiple axes and planes.

B. Ball and socket joints are uni-axial joints, which are highly mobile, allowing rotation around a central axis.

C. Ball and socket joints are bi-axial joints, which are mobile, allowing movement in two planes.

D. Ball and socket joints are uni-axial joints, which are mobile, allowing movement in a single axis and plane.

Which of these is not a part of the central nervous system?

A. spinal cord

B. tract (bundle of nerve fibers/axons)

C. brain

D. cranial nerves

Which of these is known as the pacemaker of the heart?

A. AV node

B. cardiac plexus (nerve fibers)

C. SA node

D. muscle fibers of the atria

Which of these statements is false regarding blood cells?

A. Mature red blood cells are oval, bi-concave discs with a lifespan of 120 days.

B. White blood cells are larger and less abundant than red blood cells.

C. Phagocytes and lymphocytes are the most numerous types of white blood cells.

D. Mature red blood cells are bi-concave discs that have a central nucleus and long life span.

Which of these statements is correct?

A. An oxidizing agent removes oxygen or electrons from other substances.

B. A reducing reagent either adds oxygen to, or removes electrons from, another substance.

C. An oxidizing agent either adds oxygen to, or removes electrons from, other substances.

D. A reducing agent removes oxygen from, or removes electrons to, another substance.

A body of mass 30 kg is traveling in space at a speed of 10 m/s. Given that the formula for kinetic energy is KE = 0.5 ?m ?v2, and m is mass and v is speed of an object, what is its kinetic energy?

A. 1000 J

B. 4600 J

C. 120 J

D. 1500 J

Which of these represents the correct order of some of the main energy changes that take place in a coal-fired power station?

A. chemical, heat, kinetic, electrical

B. kinetic, heat, electrical, chemical

C. chemical, electrical, heat, kinetic

D. heat, chemical, kinetic, electrical

A large amount of energy is produced in the center of sun by which phenomenon?

A. chemical reaction

B. nuclear fission

C. nuclear fusion

D. radioactive decay