Q: Which of the following equations correctly represents the ploidy changes during double fertilization in angiosperms?

$$n + n \to 2n ($$zygote), $$n + n + n \to 3n ($$endosperm)

Question 1

Which of the following is a key evolutionary advantage of seeds over spores in seed plants?

Accepted Answer

Seeds can remain dormant for years until conditions are favorable for germination.

Question 2

In gymnosperms, which structure directly produces the pollen grain?

Accepted Answer

Microsporangium

Question 3

Which of the following best describes heterospory in seed plants?

Accepted Answer

Production of two types of spores: microspores and megaspores

Question 4

A botanist discovers a plant with flagellated sperm, large cones, and palm-like leaves. To which gymnosperm phylum does this plant most likely belong?

Accepted Answer

Cycadophyta

Question 5

Which of the following is NOT a function of fruits in angiosperms?

Accepted Answer

Providing stored food for the developing embryo

Question 6

Double fertilization in angiosperms results in the formation of which two structures?

Accepted Answer

A diploid zygote and a triploid endosperm

Question 7

Which adaptation allows seed plants to reproduce without the need for water for sperm transfer?

Accepted Answer

Pollen grains

Question 8

A plant has a single cotyledon, parallel leaf venation, and scattered vascular bundles. To which group does it most likely belong?

Accepted Answer

Monocots

Question 9

Which of the following equations correctly represents the ploidy changes during double fertilization in angiosperms?

Accepted Answer

$$n + n 	o 2n ($$zygote), $$n + n + n 	o 3n ($$endosperm)

Question 10

Which of the following best explains why reduced gametophytes are advantageous in seed plants?

Accepted Answer

They are protected from environmental stress and receive nutrients from the parent sporophyte.

Question 11

Which of the following is a real-world example of a plant product derived from a seed plant and its use?

Accepted Answer

Taxol from the Pacific yew tree, used in ovarian cancer treatment

Question 12

Which of the following statements about gymnosperms is correct?

Accepted Answer

They bear 'naked' seeds, usually on cones.

Question 13

A flower with radial symmetry can be divided into equal halves by multiple planes. What is the term for this type of symmetry?

Accepted Answer

Actinomorphic

Question 14

Which of the following best describes the function of the integument in seed plants?

Accepted Answer

It forms the protective seed coat around the embryo and its food supply.

Question 15

Which of the following is a plausible consequence of large-scale deforestation in tropical regions, based on the study materials?

Accepted Answer

Loss of plant species and associated animal species, reducing biodiversity and potential sources of new medicines.

Question 16

Which of the following best explains why angiosperms are the most diverse and widespread group of plants?

Accepted Answer

They have flowers and fruits that enhance pollination and seed dispersal.

Question 17

Which of the following is a correct match between a plant group and a key characteristic?

Accepted Answer

Ginkgophyta – only one living species with fan-shaped leaves

Question 18

A scientist is studying a plant that produces both microspores and megaspores. Which process is this an example of?

Accepted Answer

Heterospory

Question 19

Which of the following best describes the relationship between plants and animals in the context of coevolution?

Accepted Answer

Herbivory selects for plant defenses, while plants select for animals that help with pollination.

Question 20

Which of the following is a multi-step process that occurs during the life cycle of a pine (gymnosperm)?

Accepted Answer

Meiosis in microsporangia produces microspores, which develop into pollen grains that are transported by wind to ovulate cones for fertilization.

Plant Diversity III: Evolution of Seed Plants (Campbell Biology, Chapter 30)

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