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 special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

Ferulic acid, coumarin and hesperidin are

  1. Secondary plant products

  2. Hormones

  3. Enzymes

  4. Vitamins
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Secondary metabolites are plant products that are not involved in the development and growth of plant but are required by the plant for its survival. Plant secondary metabolites are divided into three groups, namely flavonoids, phenolic and polyphenolic compounds like ferulic acid, hesperidin and coumarin; terpenoids; and nitrogen-containing alkaloids and sulphur-containing compounds.
Thus, the correct answer is 'Secondary plant products'.
Multiple choice special tissues plant tissues plant tissues - internal morphology and anatomy anatomy of flowering plants biology

Match List I(Type of Tissues/structures) with List II(Characteristic features of the tissue) and select the correct answer using the codes given the lists.

List-I List-II
a. Hydathodes $1$. Balloon-like protrusions into treachery element, developed from Xylem Parenchyma 
b. Collenchyma $2$. Mechanical tissue that consists of living cells, walls rich in pectin and hemicelluloses
c. Periblem $3$. Occur on leaf tips responsible for guttation
d. Tyloses $4$. Meristematic tissue responsible for the development of cortex
  1. A-$2$, B-$3$, C-$4$, D-$1$
  2. A-$3$, B-$2$, C-$1$, D-$4$
  3. A-$2$, B-$3$, C-$1$, D-$4$
  4. A-$3$, B-$2$, C-$4$, D-$1$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hydathodes are structures on leaf tips for guttation (a-3). Collenchyma is a living mechanical tissue with pectin-rich walls (b-2). Periblem is the meristematic layer that develops into the cortex (c-4). Tyloses are balloon-like outgrowths from xylem parenchyma into vessels (d-1).

Multiple choice biology micro - organism useful actions of algae introduction to algae algae

The element present in thyroxin is obtained from

  1. Laminaria

  2. Polysiphonia

  3. Porphyro

  4. Gelldium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Laminaria is a type of seaweed that is native to Japan. Laminaria contains iodine, an element that the body needs to make thyroid hormones. It is also a rich source of iron and potassium. Despite serious safety concerns about Laminaria, some people use Laminaria as medicine. Laminaria is used for weight loss, high blood pressure, as a bulk laxative for constipation, and for treating radiation sickness. It is also used for preventing cancer. Laminariales (kelps) are a major biogeochemical pump of iodine. "Laminaria" species of kelp is the species highest in iodine content. 

So, the correct answer is 'Laminaria'

Multiple choice botany mineral nutrition in plants deficiency diseases and symptoms deficiency symptoms macronutrients and micronutrients

Deficiency symptoms of radially mobilised essential elements will first appear in _________

  1. Younger tissues

  2. Older tissues

  3. Roots

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

When essential elements are mobile (radially or systemically), the plant redistributes them from older tissues to younger, actively growing tissues. Therefore, deficiency symptoms for these elements appear first in older tissues.

Multiple choice indicators of pollution biodiversity: conservation human influences on the environment option c: ecology and conservation biology

Lichens do not occur in areas with

  1. Pollution

  2. Humidity

  3. Low temperature

  4. High temperature
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lichens represent the symbiotic association between the algae and the fungi. These absorb their mineral nutrition from the moisture-laden air rather than the soil. So, the contamination of the air severely impairs their growth and they disappear from the areas that have a heavy concentration of sulphur pollutants in the air. Due to this sensitivity, these are considered to be the bioindicators of air pollution.

Hence, the correct answer is 'Pollution'.

Multiple choice botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

When the filament of anther is fixed at a point about the middle of the connective and the movement is free in the sac is called as ______

  1. Versatile

  2. Basifixed

  3. Adnate

  4. Dorsifixed
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In most grasses, the attachment is versatile where the filament is attached merely at a point about the middle of the connective so that the anthers can swing on it freely.

Multiple choice botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

Hesperidium develops from an ovary which is

  1. Polycarpellary, superior and syncarpous

  2. Polycarpellary, inferior and syncarpous

  3. Polycarpellary, superior and apocarpous

  4. Bicarpellary, superior and syncarpous
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Hesperidium is a type of berry in which the epicarp and mesocarp fuse and form a leathery covering which can be removed and the endosperm forms the fibrous septa. It develops from a polycarpellary, superior and syncarpous ovary. So, the correct answer is 'Polycarpellary, superior and syncarpous'.
Multiple choice botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

Flowers showing basipetal succession are observed in

  1. Caesalpinia and Clerodendron

  2. Jasmine and Gold mohar

  3. Gold mohar and Caesalpinia

  4. Clerodendron and Jasmine
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Floral succession can be racemose, cymose, special type or mixed type. In racemose inflorescence, flowers are arranged in acropetal succession. in which the younger flowers are at the apex and the older flowers are at the base. In cymose inflorescence, flowers are arranged in basipetal succession in which the younger flowers are at the base and the older flowers are at the apex. Clerodendron and Jasmine show basipetal succession
So, the correct answer is 'Clerodendron and Jasmine'
Multiple choice botany flower androecium and gynoecium flower: accessory parts and reproductive parts reproductive morphology

Long filamentous threads protruding at the end of a young cob of maize are-

  1. Anthers

  2. Styles

  3. Ovaries

  4. Hairs
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
In a cob of maize, each ovary has a long silky (hairy) style, called as corn silk. Collectively these styles protrude at the end of a young cob. The grains are formed on the cob which remains covered by the leafy bracts.

So, the correct answer is 'Styles'.