Examen
Biology
- Grado
- Institución
This exam contains biology topics all well tested and covered questions and answers graded A+
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Biology Practice test QUESTIONSAND ANSWERS GRADED A +
2024/2025
Which of the following statements is TRUE?
A) When mature, the carpel will become the seed and the anther will become the
fruit.
B) When mature, the ovules will become seeds and the ovary will develop into a fruit.
C) When mature, the stamen will become the seed and the stigma will become the
fruit.
D) The filament and anther enclose the stigma and style.
E) The style, which is vase-shaped, contains the ovary, stigma, and anther. -
ANSWER B
Which of the following would you be unable to locate in xylem tissue?
A) Tracheids
B) Sclerenchyma cells
C) Sieve tube elements
D) Vessel elements
E) Cell walls with porous dimples called pits - ANSWER B
Which of these hormones stimulates the production of milk?
A) Colostrum
B) Oxytocin
C) Progesterone
D) Prolactin
E) Estrogen - ANSWER D
Which stores starches? __________ - ANSWER Ground tissue
Why can't plants use N2 directly as a nutrient?
A) Plants lack the enzymes necessary to convert N2 into NO3−or NH4+.
B) Plants must use NO3− to carry out nitrogen fixation.
C) Most soils are depleted of N2 as a nutrient.
D) N2 diffuses out of leaves as quickly as it diffuses in, so it has to be "fixed" to
remain in leaves.
E) The N2 molecule is too large to enter the stomata. - ANSWERA
Your biceps muscle is derived from the
A) endoderm.
B) ectoderm.
C) mesoderm.
D) blastopore.
E) amnion. - ANSWER C
18) A pollen grain is actually the
A) male gametophyte.
B) female gametophyte. - ANSWER A
24) An incomplete flower
A) lacks one or more of the four basic floral parts.
, B) remains in the bud stage and does not bloom.
C) produces sterile seeds.
D) manufactures infertile pollen.
E) is incapable of self-fertilization. – ANSWER A
43) What are the results of double fertilization?
A) Diploid zygote and diploid endosperm
B) Egg cell and sperm cell
C) Embryo sac and pollen sac
D) Triploid endosperm and diploid zygote
E) A zygote and an embryo - ANSWER A
Meiosis produces a ________, which eventually gives rise to an egg in an
unfertilized seed.
A) microspore
B) pollen tube
C) sporophyte
D) megaspore
E) sepal - ANSWER D
Minerals dissolved in water
enter root epidermal cells - ANSWER by active transport.
Most fetuses can survive outside the womb after a minimum of ________ weeks.
A) 15
B) 20
C) 32
D) 38
E) 45 - ANSWER C
Most of the interior of a leaf consists of soft, thin-walled, living ________ cells.
A) collenchyma
B) guard
C) sclerenchyma
D) epidermal
E) parenchyma – ANSWER E
Mycorrhizae are symbiotic associations between fungi and plant
A) leaves.
B) stems.
C) roots.
D) flowers.
E) seeds. – ANSWER C
Of the major tissue systems associated with land plants, the ________ tissue system
covers the outer surface of the primary plant.
A) ground
B) meristem
C) dermal
D) vascular
E) parenchyma - ANSWER C
One of the first events of animal development is the division of this cell, a process
called __________ - ANSWER Cleavage
5) The metamorphosis of a caterpillar into a butterfly is an example of
A) direct development.
B) placental development.
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