Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology seeds - structure and germination germination seed germination the flower

Seeds are the basis of out agriculture and offer several advantages to angiosperms. Find the odd statement among the following.

  1. Seeds have better adaptive strategies for dispersal

  2. Seeds may have wings for their dispersal

  3. Seeds have sufficient food reserves to nourish immature haploid embryo on germination

  4. Seeds may remain alive for long
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology seeds - structure and germination germination seed germination the flower

True or False:
Plants need an optimum temperature of $5^o - 15^o C$ for germination.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Seed germination can occur across a wide range of temperatures depending on the plant species, and many plants germinate well outside a strict 5 to 15 degree Celsius range, making the blanket statement false.

Multiple choice biology seeds - structure and germination germination seed germination the flower

In some plants, particularly halophytes, the seeds germinate with fruits while still attached to the parent plant. Identify this phenomenon from the following terms.

  1. Sesimonasty

  2. Vivipary

  3. Monocarpic

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

Vivipary is the phenomenon of germination of seeds inside the fruit while it is still attached to the parent tree. Such adaptation is found in halophytes. Viviparous plants produce seeds that germinate before they detach from the parent. In many mangroves, for instance, the seedling germinates and grows under its own energy while still attached to its parent.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Coleoptile in a grass seedling, is the covering over

  1. Scutellum

  2. Radicle

  3. Plumule

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

Coleoptile is the pointed protective sheath covering the emerging shoot in monocotyledons such as grasses. Coleoptiles have two vascular bundles, one on either side. Coleoptiles consist of very similar cells that are all specialised to fast stretch growth. They do not divide, but increase in size as they accumulate more water. Coleoptiles also have water vessels along the axis to provide a water supply. 
Thus, the correct answer is option C.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Vivipary is shown by .............

  1. Cocos

  2. Squash

  3. Rhizopora

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vivipary has two different meanings. In animals, it means development of the embryo inside the body of the mother, eventually leading to live birth, as opposed to laying eggs. In plants, it means reproduction via embryos, such as buds, that develop from the outset without interruption, as opposed to germinating externally from a seed. Examples: Cocos, Squash, Rhizophora. It is because all these seeds have high moisture content.

Multiple choice biology seeds - structure and germination germination seed germination the flower

Oldest known crop of the world is of

  1. Wheat

  2. Rice

  3. Barley

  4. Both (A) and (C)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The first domesticated crops include eight plant species with three cereals, four pulses and flax. These are namely Triticum dicoccum, T. monococcum, Hordeum vulgare, lentils, pea, chick pea and bitter vetch. Thus, out of the given options, barley and wheat the one of the oldest cultivated crop of world. 
Thus, the correct answer is option D.

Multiple choice biology seeds - structure and germination germination seed germination the flower

At the time of germination, cotyledon and endosperm do not come out of the soil. This type of germination is called as

  1. Hypogeal germination

  2. Epigeal Germination

  3. Monoecious germination

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

The germination process which takes place below the ground and the cotyledon and endosperm do not come out of the soil is called as Hypogeal germination.

So the correct option is 'Hypogeal germination.'

Multiple choice biology seeds - structure and germination germination seed germination the flower

Germination in which cotyledons come above the surface of soil is known as 

  1. Epigeal

  2. Hypogeal

  3. Parthenocarpic

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

In many dicotyledons like beans, castor, and some monocotyledons, the cotyledon is pushed above the soil by rapid elongation of the hypocotyl and they function as photosynthetic organs till the establishment of the seedling. This kind of germination is known as epigeal germination.