Biology · Environmental Studies

Plant Reproduction and Germination

892 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 botany modes of reproduction structure of male and female reproductive structures structure of ovule gynoecium

Which of the following structures is unique to the seed of a monocot?

  1. Coleoptiles

  2. Radicle

  3. Seed coat

  4. Endosperm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A monocotyledonous seed is the one which has a thick seed coat. Inside the seed coat are the endosperm and the embryo. Endosperm is the nourishing tissue which provides food for the growing embryo. In monocots, single cotyledon present is called as scutellum which absorbs nourishment from the endosperm and transfers to the growing embryo. The embryo has two structures namely, radicle and plumule. Radicle, the future root is protected by a sheath called as coleorhiza and plumule, the future shoot is protected by a sheath called as coleoptile. 
So the correct option is 'coleoptiles'.
Multiple choice biology movement and locomotion in living organisms movements in plants coordination in plants tropic and nastic movements in plants

Hydrotropism have seen in

  1. Flowers

  2. Seedlings

  3. Stem

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

A tropism is a plants growth response to an external stimulus. If resulting plant growth is toward the stimulus, it is called as a positive tropism. If the resulting plant growth is away from the stimulus, it is called as a negative tropism. There are several different types of tropisms, including phototropism, gravitropism, and thigmotropism. 

Hydrotropism is movement towards water. It is a positive tropic movement. Seedlings show hydrotropism.

Multiple choice movement in plants living world of plants - plant physiology biology

What determines the flowering of a plant?

  1. The amount of light

  2. The amount of uninterrupted darkness

  3. Photons activating Photosystems I and II

  4. Water and warmth
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plant in order to flower require a particular day length or light period called photoperiod and response of the plants to photoperiod in terms of flowering is called photoperiodism. Photoperiodism is the response to duration and timing of light and dark periods.

Multiple choice botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

Some seeds are dispersed by animals ,especially spiny seeds with hooks which get attached to the bodies of animals and are carried to  distant places. Examples is/are -

  1. Xanthium and urena

  2. Xanthium

  3. urena

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

The seeds of the fruits get dispersed by different methods. Xanthium and Urena are the plants in which the fruits produces seeds having structures like spines or hooks. These structures are used for clinging the seeds on the body of the animals and get carried away with them and get dispersed.

Thus, the correct answer is option A. 

Multiple choice botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization
Animal vectors are required for pollination in

  1. Mulberry

  2. Cucumber

  3. Maize

  4. Vallisneria
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
• Mulberry is pollinated by wind.
• Cucumber is pollinated by bees.
• Maize is pollinated by wind.
• Vallisneria is pollinated by water.
Hence, animal vector is required for the pollination of Cucumber. So, the correct answer is B.
Multiple choice botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

Crows helps in the pollination of

  1. Agave

  2. Bombax

  3. Erythrina

  4. Bignonia
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Eight species of birds were observed in contact with open flowers on focal
agaves; of these, rufous hummingbirds were most common. Two additional species, Zenaida asiatica (white-winged dove) and Corvus sp. (one of three species of ravens and crows potentially present in the study area), were observed at open flowers on non-focal plants.
So the correct option is 'Agave'.
Multiple choice botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

Which one is absent in windy areas

  1. Birds

  2. Anemophilous plants

  3. Zoophilous plants

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

Windy areas are favorable for plants in which pollination is done by the wind like corn, willow etc while it is unfavorable for those in which pollination is done by animals as it is very difficult to survive.

So the correct option is 'Zoophilous plants'.

Multiple choice botany pollination, fertilization and development of endosperm and embryo agents of pollination environmental conservation and biodiversity pollination and fertilization

Myrmecophily is characterised by 

  1. Plants harbouring ants

  2. Plants storing food underground

  3. Plants imitating the habit of animals

  4. Plants with small leaves
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Myrmecophily is the symbiotic relationship between plant and ants in which plants provide food to plant or place to hide eggs and ants help them in pollination. 

So the correct option is 'Plants harbouring ants'

Multiple choice evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

Pollen grains can be stored in a viable condition for many years in which of the following conditions?

  1. Anaerobic conditions in 0$^o$ C
  2. Liquid nitrogen (-196$^o$ C)
  3. Liquid nitrogen (0$^o$ C)
  4. Liquid hydrogen (196$^o$ C)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Pollen grains are stored for many years in the liquid nitrogen, having the temperature of -196 degrees of Celsius. This method of saving is called cryopreservation. The low temperature allows storing for a longer period as it reduces the growth rate of cells. The cryoprotective agents delay the aging of the plants and protect the plants from the damages due to cold.
So, the correct answer is 'Liquid nitrogen (-196$^o$ C)'.
Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Rudimentary seed habit is found in

  1. Selaginella

  2. Lycopodium

  3. Equisetum

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

Rudimentary seed habit means plants are reproducing sexually by seed but it is not fully developed. For e.g. in Selaginella female gametophytes are retained on the parent sporophytes for different periods. Within the female gametophytes, the development of the zygote into young embryos takes place. This event is a very important step in evolution as a precursor to seed habit. 

So the correct option is 'Selaginella'.

Multiple choice classification of pteridophytes kingdom plantae plant kingdom biology

Rudimentary seed habit occurs in

  1. Lycopodium

  2. Selaginella

  3. Psilotum

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

Selaginella is considered to show a rudimentary seed habit because the megaspore is retained within the megasporangium and the female gametophyte develops while still attached to the parent plant.