FREE NEET Biology Practice MCQ Test: Plant Kingdom Exercise 1 Questions Answers With Detailed Explanations [PDF]

Answer: (b)

Phaeophyceae possesses chlorophyll a, c, carotenoids and xanthophylls. Members of phaeophyceae show variations in colour from olive green to different shades of brown depending upon the amount of the xanthophyll pigments.

Answer: (c)

In gymnosperms, pollen chamber represents the microsporangium in which pollen grains develop. The microspore is generally a globular sac like structure having large number of microspores. The microspores are also termed as pollen grains.

Answer: (c)

Answer: (b)

Answer: (d)

Answer: (d)

An elater is a cell (or structure attached to a cell) that is hygroscopic and therefore will change shape in response to changes in moisture in the environment. Elaters come in a variety of forms, but are always associated with plant spores. In plants that do not have seeds, they function in dispersing the spores to a new location. In the liverworts, elaters are cells that develop in the sporophyte alongside the spores. They are complete cells, usually with helical thickenings at maturity that respond to moisture content. In most liverworts, the elaters are unattached, but in some leafy species (such as Frullania) a few elaters will remain attached to the inside of the sporangium (spore capsule). The elaters by hygroscopic movement help in spore dispersal.

Answer: (a)

Bryophytes are called amphibians of plant kingdom because they complete their vegetative phase on land but water is necessary for their reproductive phase. Water helps in maturation and dehiscence of sex organs in bryophytes. It also helps in the transfer of sperms to the archegonium that make water essential for completion of life cycle of bryophytes.

Answer: (d)

Answer: (a)

According to the features described, the unknown plant belongs to bryophytes. Bryophytes refer to a group of plants comprising the mosses, liverworts, and hornworts. They do not have a true vascular system and are unable to pull water and nutrients up from the ground at any significant distance. This distinguishes bryophytes from ferns and flowering plants.

Answer: (c)

Rhodophyceae is red algae in which food is stored as floridean starch, similar to amylopectin and glycogen in structure.

Answer: (b)

Answer: (a)

In gymnosperms (like Pinus), the male and female gametophyte do not have an independent free living existence. They remain within the sporangia retained on the sporophytes, i.e., female gametophyte (within megasporangium) and male gametophyte (within microsporangium).

Answer: (d)

Answer: (b)

Conifers belong to gymnosperms. They are seed bearing plants in which the sporophylls are aggregated to form cones and the seeds develop in exposed state over the surface of megasporophylls. Vascular strand consists of tracheids and sieve cells. Female gametophyte forms archegonia, provides nourishment to developing embryo and later gets transformed into food-laden tissue or endosperm inside the seed. This endosperm is formed before fertilization so it is haploid in nature. It provides nourishment for growth of seedlings at the time of seed germination. Grass is an angiospermic plant and endosperm is produced after fertilization.

Answer: (a)

Answer: (b)

Answer: (b)

Asexual reproduction (in algae) is by the production of different types of spores, and the most common type is zoospore. Zoospores are flagellated (motile) and on germination give rise to new plants.

Answer: (d)

Answer: (a)

Salvinia is an aquatic fern with both annual and perennial species.It is heterosporous i.e. with two types of spores,microspores and megaspores.

Answer: (d)