Biology · Science General

Botany and Plant Science

4,989 Questions

Botany and plant science delve into the biological study of plant life, covering structural anatomy, physiological processes, and reproductive mechanisms. Key topics include inflorescence patterns, root modifications, and seed development, which are vital for biology sections in medical entrance exams. This collection of practice questions helps solidify understanding of complex plant functions.

Plant ReproductionPlant AnatomyRoot ModificationsInflorescence PatternsPlant Morphology

Botany and Plant Science Questions

Multiple choice

Find the odd one out.

  1. Widow flower

  2. Teasel

  3. Devil's bit

  4. Twinflower
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Twinflower is an exception as it belongs to genera Linnaea of the family Caprifoliaceae. Thus, it is the odd one out.

Multiple choice

Which of the following statements about the family Asclepiadoideae is false?

  1. It contains a significant number of leafless stem succulents.

  2. The bright colour of its flowers attracts pollinators.

  3. Its pollen is grouped into pollinia.

  4. Rojasia and Microloma belong to this family.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the family Asclepiadoideae, it is not the colour of flowers which attracts pollinators. It is the fragrance of the flowers that attracts flies.

Multiple choice

Which of the following families consists of bridal wreaths?

  1. Flacourtiaceae

  2. Francoaceae

  3. Fumariaceae

  4. Erythropalaceae
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Francoa of family the Francoaceae is commonly known as bridal wreaths. Francoa sonchifolia may grow up to one metre high and produce basal clumps of round, deeply lobed, dark green and fuzzy leaves with winged leafstalks.

Multiple choice

Which of the following statements is correct for howellia aquatilis, a small plant of the family Campanulaceae?

  1. The species has high genetic diversity.

  2. It is considered to be a threatened species.

  3. Seeds require water for germination.

  4. Flowers have a prominent corolla.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is correct. Howellia aquatilis is considered to be a threatened species since 1994 because of loss of habitat. It is due to logging, draining and conversion to urban use.

Multiple choice

Directions: Two statements A and B are given below. Read the statements carefully and choose the correct option.

A: Hydrocleys nymphoides is common in water gardens. B: It is persistent in the wilds of Florida and Texas.

  1. Both statements A and B are correct and B is the correct explanation of A.

  2. Both statements A and B are correct and B is not the correct explanation of A.

  3. Both statements A and B are incorrect.

  4. Statement A is incorrect but B is correct.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Both statements A and B are correct and B is the correct explanation of A. Hydrocleys nymphoides is common in water gardens and probably for this reason, it is persistent in the wilds of Florida and Texas.

Multiple choice

Tanin and resins are stored by

  1. Parenchyma

  2. Collenchyma

  3. Sclerenchyma

  4. Sclereids

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cells are isodiametric, i.e. equally expanded on all sides. They may be oval, round, polygonal or elongated. Nucleus is present and hence, living. The cell walls are thin and made of cellulose. Cytoplasm is dense with a single large vacuole. Intercellular spaces may be present. Parenchyma which contain chlorophyll is called chlorenchyma.  It gives mechanical strength by maintaining turgidity and stores waste products like tanin, gum, crystals and resins.

Multiple choice

The presence of bundle sheath with chloroplast in the leaves which are granulated and lacking in starch is known as chloroplast dimorphism. Such feature is observed in

  1. hornwort

  2. wheat

  3. pineapple

  4. maize
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chloroplast dimorphism is seen in maize plant. Maize plant is a C4 plant. The bundle sheath cells contain starch-rich chloroplasts which differ from those in mesophyll cells present as the outer ring. Thus, chloroplasts are dimorphic.

Multiple choice

Phloem parenchyma is absent in

  1. dicot root

  2. dicot leaf

  3. all the stems

  4. monocot stem

  5. none of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Phloem parenchyma is absent in monocot stem.

Multiple choice

Centripetal xylem is present in:

  1. roots

  2. all the stems

  3. monocot stems only

  4. dicot stems only

  5. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Centripetal xylem is present in roots.