CLEP Biology Plant Reproduction and Structure 3 — Questions and Answers
Question 1: In gymnosperms, the female gametophyte is located within the:
- Ovule (Correct answer)
- Anther
- Stigma
- Receptacle
Correct answer: Ovule
In gymnosperms, the ovule contains the female gametophyte (megagametophyte), which produces the egg cell for fertilization.
Question 2: Which of the following best describes the sporophyte generation in land plants?
- The diploid, spore-producing generation (Correct answer)
- The haploid, gamete-producing generation
- The structure that produces pollen
- The photosynthetic prothallus of ferns
Correct answer: The diploid, spore-producing generation
The sporophyte is the diploid (2n) generation that produces spores via meiosis in the alternation of generations life cycle.
Question 3: In ferns, the gametophyte is called the:
- Prothallus (Correct answer)
- Frond
- Sorus
- Rhizome
Correct answer: Prothallus
The prothallus is the small, heart-shaped, independent haploid gametophyte of ferns that produces both eggs and sperm.
Question 4: The sori found on the underside of fern fronds are:
- Clusters of sporangia that produce spores (Correct answer)
- Groups of root hairs for nutrient absorption
- Structures that produce egg cells
- Collections of symbiotic bacteria
Correct answer: Clusters of sporangia that produce spores
Sori are clusters of sporangia (spore-producing structures) found on the lower surface of fern fronds.
Question 5: Which feature distinguishes vascular plants from non-vascular plants (bryophytes)?
- Presence of xylem and phloem (Correct answer)
- Ability to undergo photosynthesis
- Dependence on water for fertilization
- Alternation of generations life cycle
Correct answer: Presence of xylem and phloem
Vascular plants possess xylem (water transport) and phloem (food transport) tissues, which are absent in bryophytes.
Question 6: In mosses, which generation is dominant and photosynthetically active?
- Gametophyte (Correct answer)
- Sporophyte
- Both are equally dominant
- Neither; mosses lack chloroplasts
Correct answer: Gametophyte
In mosses (bryophytes), the haploid gametophyte is the dominant, green, photosynthetic generation, unlike in vascular plants.
Question 7: Wind pollination (anemophily) is most commonly associated with which type of flowers?
- Small, inconspicuous flowers with large amounts of light pollen (Correct answer)
- Large, brightly colored flowers with nectar guides
- Flowers with deep tubular structures
- Flowers that produce strong fragrances at night
Correct answer: Small, inconspicuous flowers with large amounts of light pollen
Wind-pollinated flowers are typically small, lack petals and scent, and produce abundant, lightweight, smooth pollen to maximize dispersal.
CLEP Biology Plant Reproduction and Structure 3
In gymnosperms, the female gametophyte is located within the: