1|Page
Final Exam LRA 2025 | Comprehensive Q&A
For Certification Success
Which of the following is the correct order of floral organs from the outside to the
inside of a complete flower?
A. petals → sepals → stamens → carpels
B. sepals → stamens → petals → carpels
C. sepals → petals → stamens → carpels
D. spores → gametes → zygote → embryo -correct-answer-C. sepals → petals →
stamens → carpels
The egg of a plant has a haploid chromosome number of 12 (n = 12). What is true
about the number of chromosomes in the cells of other tissues of this plant?
A. The endosperm has 36 chromosomes.
B. The leaves and stems have 24 chromosomes.
C. The sperm has 12 chromosomes.
D. All of the above -correct-answer-D. All of the above
Which of the following is correct about all angiosperms?
A. Gametophyte is the dominant generation.
B. Gametophyte is microscopic and hidden inside the sporophyte body parts.
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C. Sporophyte is microscopic and hidden inside the gametophyte body parts.
D. None of the above -correct-answer-B. Gametophyte is microscopic and hidden
inside the sporophyte body parts.
Interstitial fluid is ?
A. the internal environment inside animal cells.
B. a site of exchange between body cells and the circulatory fluids (for example,
blood).
C. found only in the lumen of the small intestine.
D. large, cube-shaped cells. -correct-answer-B. a site of exchange between body
cells and the circulatory fluids (for example, blood).
The four main types of animal tissues that form organ/s or organ systems are:
A. nervous, connective, vascular and ground.
B. nervous, muscle, connective and ground.
C. nervous, epithelial, connective and muscle.
D. reproductive, vascular, connective and dermal. -correct-answer-C. nervous,
epithelial, connective and muscle.
Penguins, seals, and tuna have body forms that permit rapid swimming, because
.
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A. this is the only shape that will allow them to maintain a constant body
temperature in water.
B. all of their bodies have been compressed since birth by intensive underwater
pressures.
C. all share a recent common ancestor.
D. The shape is a convergent evolutionary solution, which reduces drag while
swimming. -correct-answer-D. The shape is a convergent evolutionary solution,
which reduces drag while swimming.
As animals have evolved large body size, they have also evolved adaptations to
improve exchange of energy and materials with the environment. For example, in
many larger organisms, evolution has favored lungs and a digestive tract with
.
A. increased thickness.
B. more branching or folds.
C. larger cells
D. decreased blood supply. -correct-answer-B. more branching or folds.
When the body's blood glucose level rises, the pancreas secretes insulin and, as a
result, the blood glucose level declines. When the blood glucose level is low, the
pancreas secretes glucagon and, as a result, the blood glucose level rises. Such
regulation of the blood glucose level is the result of .
A. negative feedback.
B. positive feedback.
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C. catalytic feedback.
D. protein-protein interactions. -correct-answer-A. negative feedback.
The body's automatic tendency to maintain a constant and optimal internal
environment is termed as .
A. balanced equilibrium.
B. physiological chance.
C. static equilibrium.
D. homeostasis. -correct-answer-D. homeostasis.
If a person were to travel to a time zone that was several hours ahead of their
own, they may experience tiredness known as jet lag. Jet lag is due to a disruption
of .
A. water balance.
B. circadian rhythm.
C. body temperature.
D. nerve impulses. -correct-answer-B. circadian rhythm.
In a cool environment, an ectotherm is more likely to survive an extended period
of food deprivation than would an equally sized endotherm because the
ectotherm .
A. has greater insulation on its body surface.
Final Exam LRA 2025 | Comprehensive Q&A
For Certification Success
Which of the following is the correct order of floral organs from the outside to the
inside of a complete flower?
A. petals → sepals → stamens → carpels
B. sepals → stamens → petals → carpels
C. sepals → petals → stamens → carpels
D. spores → gametes → zygote → embryo -correct-answer-C. sepals → petals →
stamens → carpels
The egg of a plant has a haploid chromosome number of 12 (n = 12). What is true
about the number of chromosomes in the cells of other tissues of this plant?
A. The endosperm has 36 chromosomes.
B. The leaves and stems have 24 chromosomes.
C. The sperm has 12 chromosomes.
D. All of the above -correct-answer-D. All of the above
Which of the following is correct about all angiosperms?
A. Gametophyte is the dominant generation.
B. Gametophyte is microscopic and hidden inside the sporophyte body parts.
,2|Page
C. Sporophyte is microscopic and hidden inside the gametophyte body parts.
D. None of the above -correct-answer-B. Gametophyte is microscopic and hidden
inside the sporophyte body parts.
Interstitial fluid is ?
A. the internal environment inside animal cells.
B. a site of exchange between body cells and the circulatory fluids (for example,
blood).
C. found only in the lumen of the small intestine.
D. large, cube-shaped cells. -correct-answer-B. a site of exchange between body
cells and the circulatory fluids (for example, blood).
The four main types of animal tissues that form organ/s or organ systems are:
A. nervous, connective, vascular and ground.
B. nervous, muscle, connective and ground.
C. nervous, epithelial, connective and muscle.
D. reproductive, vascular, connective and dermal. -correct-answer-C. nervous,
epithelial, connective and muscle.
Penguins, seals, and tuna have body forms that permit rapid swimming, because
.
,3|Page
A. this is the only shape that will allow them to maintain a constant body
temperature in water.
B. all of their bodies have been compressed since birth by intensive underwater
pressures.
C. all share a recent common ancestor.
D. The shape is a convergent evolutionary solution, which reduces drag while
swimming. -correct-answer-D. The shape is a convergent evolutionary solution,
which reduces drag while swimming.
As animals have evolved large body size, they have also evolved adaptations to
improve exchange of energy and materials with the environment. For example, in
many larger organisms, evolution has favored lungs and a digestive tract with
.
A. increased thickness.
B. more branching or folds.
C. larger cells
D. decreased blood supply. -correct-answer-B. more branching or folds.
When the body's blood glucose level rises, the pancreas secretes insulin and, as a
result, the blood glucose level declines. When the blood glucose level is low, the
pancreas secretes glucagon and, as a result, the blood glucose level rises. Such
regulation of the blood glucose level is the result of .
A. negative feedback.
B. positive feedback.
, 4|Page
C. catalytic feedback.
D. protein-protein interactions. -correct-answer-A. negative feedback.
The body's automatic tendency to maintain a constant and optimal internal
environment is termed as .
A. balanced equilibrium.
B. physiological chance.
C. static equilibrium.
D. homeostasis. -correct-answer-D. homeostasis.
If a person were to travel to a time zone that was several hours ahead of their
own, they may experience tiredness known as jet lag. Jet lag is due to a disruption
of .
A. water balance.
B. circadian rhythm.
C. body temperature.
D. nerve impulses. -correct-answer-B. circadian rhythm.
In a cool environment, an ectotherm is more likely to survive an extended period
of food deprivation than would an equally sized endotherm because the
ectotherm .
A. has greater insulation on its body surface.
