BIO-1407 Practice Exam 2

Which of the following best describes the relationship between surface area and volume in animal cells as it relates to exchange with the environment?

• Rate of exchange is proportional to volume, amount of exchange is proportional to surface area
• Rate of exchange is proportional to surface area, amount of exchange is proportional to volume
• Both rate and amount of exchange are proportional to surface area
• Both rate and amount of exchange are proportional to volume

Answer explanation

Rate of exchange depends on surface area, while the total amount depends on volume.

A flatworm minimizes the distance between its cells and the external environment, which primarily aids which process?

• Muscle contraction
• Immune defense
• Diffusion of materials
• Energy storage

Answer explanation

Reducing distance to the environment helps with diffusion of materials.

In humans, fertilization most commonly occurs in the:

• Cervix

• Vagina

• Uterine fundus

• Oviduct

Answer explanation

The correct order is: Cells → Tissues → Organs → Organ Systems.

Tags

NGSS.HS-LS1-2

Which tissue type functions primarily as a barrier to mechanical injury and fluid loss, and is tightly joined?

• Connective
• Epithelial
• Nervous
• Muscle

Answer explanation

Epithelial tissue forms a protective barrier.

Which connective tissue type is specialized for fat storage and insulation?

• Adipose tissue
• Cartilage
• Loose connective tissue
• Bone

Answer explanation

Adipose tissue is specialized for storing fat and insulating the body.

If a vertebrate animal’s internal temperature varies with environmental temperature, it is best described as:

• An endothermic conformer
• An ectothermic regulator
• An ectothermic conformer
• An endothermic regulator

Answer explanation

Ectothermic conformers allow their internal temperature to vary with the environment.

Tags

NGSS.HS-LS1-3

Which feedback mechanism is most commonly involved in homeostasis?

• Negative feedback
• Neural feedback
• Open-loop feedback
• Positive feedback

Answer explanation

Negative feedback is the primary mechanism for maintaining homeostasis.

Tags

NGSS.HS-LS1-3

Blood clotting in animals is an example of which type of feedback loop?

• Open-loop feedback
• Positive feedback
• Homeostatic feedback
• Negative feedback

Answer explanation

Blood clotting amplifies the response, making it a positive feedback loop.

Tags

NGSS.HS-LS1-3

Basal metabolic rate (BMR) in humans is best defined as:

• The total food intake per day
• The energy needed for active transport
• The rate of energy expenditure during exercise
• The minimum energy required to stay alive at rest

Answer explanation

BMR is the minimum energy required by an organism at rest.

Which is an advantage of sexual reproduction over asexual reproduction?

• Increases genetic variation in offspring
• Requires less energy
• Produces genetically identical offspring
• Enables faster reproduction

Answer explanation

Sexual reproduction increases genetic variation.