Biology · Environmental Studies

Plant Reproduction and Germination

835 Questions

Plant reproduction and germination involve seed structure, cotyledon function, and dispersal mechanisms. These core botany concepts frequently appear in general science sections. Practice these questions to ensure better retention.

Seed germination typesSeed dispersal mechanismsCotyledons and albuminous seedsCryptogamic plantsPhanerogams reproduction

Plant Reproduction and Germination Questions

Multiple choice chemistry phenomena around us changes and its classification types of changes classification of changes

A seed growing into a tree is an example of:

  1. slow physical change

  2. fast periodic change

  3. slow natural change

  4. man-made reversible change
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A seed growing into a tree is an example of a slow and natural process. Slow because it takes days to sometimes months for a seed to develop into a sapling and then years to a develop into a tree. All these processes occur naturally using all natural resources like water, sunlight, soil.

Multiple choice biology seeds - structure and germination dicot seed structure of monocot and dicot seed the seed monocot seed

A dicot exalbuminous seed is

  1. Pea

  2. Ester

  3. Rice

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

Pea is a dicot exalbuminous seed. In the non-endospermic dicotyledons the endosperm is absorbed by the embryo as the latter grows within the developing seed and the cotyledons of the embryo become filled with stored food. At maturity, seeds of these species have no endosperm and are also referred to as exalbuminous seeds. The exalbuminous seeds include the legumes such as beans and peas.
Therefore, the correct answer is option A.

Multiple choice biology seeds - structure and germination dicot seed structure of monocot and dicot seed the seed monocot seed

Some plants of Angiosperms are called as dicotyledons, because their seedlings contain

  1. Three cotyledons

  2. Two cotyledons

  3. Many cotyledons

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

Dicots have floral parts in multiples of four or five, and their seeds contain two cotyledons. The cotyledons usually absorb the food from the endosperm first, and then provide the food for the embryo. 

Multiple choice biology seed dicot seed structure of monocot and dicot seed the seed

X is scar on the seed through which the developing seeds were attached to the fruit; above the X is a small pore called Y.
Identify X and Y and select the correct option.

  1. X - Micropyle, Y - Hilum

  2. X - Hilum, Y - Micropyle

  3. X - Testa, Y - Tegmen

  4. X - Chalaza, Y - Micropyle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

X - Hilum - it is the point of attachmnet of the ovule to its stalk or the funicle

Y - Micropyle, the pore or the opening of the ovule, where the integuments do not cover the ovule. It is an opening for the entry of the pollen tube during fertilization.
So, the correct answer is (b).

Multiple choice botany how plants grow experiments on photosynthesis - light importance of light for photosynthesis photosynthesis necessities- experiments various experiments on photosynthesis experiments on photosynthesis - gases

The upper dormant seeds of cocklebur(Xanthium) germinate only under high oxygen levels. The oxygen is required for _______________.

  1. Degradation of inhibitors

  2. Synthesis of promoters

  3. Respiration

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

In many dormant seeds, oxygen is required for the aerobic respiration process that provides the energy and metabolic intermediates necessary to degrade growth inhibitors (like ABA) that maintain dormancy.

Multiple choice biology nutrition and respiration importance of light for photosynthesis various experiments on photosynthesis experiments on photosynthesis - gases

Before setting up an experiment to show that seeds release $CO _{2}$ during respiration, the
seeds should be :

  1. dried completely.

  2. boiled to make them soft.

  3. soaked in vinegar.

  4. kept moist till they germinate.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

To demonstrate respiration, seeds must be alive and metabolically active. Germinating seeds are actively respiring and consume oxygen while releasing carbon dioxide.

Multiple choice biology seed dispersal food material and source sources of food and food habits of animals forests: our lifeline

Scattering of seeds over a wide area is called ...........

  1. Pollination

  2. Fertilisation

  3. Dispersal

  4. Germination
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  1. Transfer of pollen grains from the anther to the stigma of either same of a different flower of the same or different plant is pollination.
  2. The fusion of male and female gametes is known as fertilization.
  3. Scattering of seeds over a wide area by animals or other means is called dispersal.
  4. Growing of a new plant from seed under the favorable condition is known as germination.
So the correct option is "Dispersal".

Multiple choice biology respiration and energy transfer respiratory quotient-basic respiration-plants respiratory quotient

R.Q. of a germinating ground nut and castor seed is

  1. 1.

  2. < 1.

  3. > 1.

  4. 0.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The respiratory quotient depends upon the type of respiratory substrate used during respiration. When fats are used in respiration, the RQ is less than 1. Groundnut and  castor seeds are fats storing seeds, the stored fats are mobilised during their seed germination. Hence, the RQ value is less than one for germinating groundnut and castor seeds.

Multiple choice biology respiration and energy transfer respiratory quotient-basic respiration-plants respiratory quotient

In a germinating seed, when protein is aerobically oxidized, the R.Q. value will be

  1. Less than one

  2. More than one

  3. Zero

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

The respiratory quotient (RQ) is the ratio of 
RQ = CO$ _{2}$ eliminated / O$ _{2}$ consumed.
When carbohydrates are being oxidized in the organism and the requisite oxygen is available, the RQ is 1. In the oxidation of fats, the RQ is 0.7 and in the oxidation of proteins, 0.8. Whenever the substrate is protein, RQ is always less than one (0.5-0.9). So, in germinating seeds, when protein is aerobically oxidized, the R.Q value will be less than one. Thus, option A is correct and other options are incorrect.

Multiple choice evs seed becomes plant germination of seed seed germination journey of seed

A gas which assists in germination of pea seed is 

  1. Sulphur

  2. Oxygen

  3. Hydrogen

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Germination of seed require a lot of energy and the rate of respiration increases and need of oxygen also increases as the metabolic rate is very high at this time.

So the correct option is 'Oxygen'.