Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology reproduction in living organisms growth and development in plants sexual reproduction in plants post fertilization - plants

After fertilization, the outer integument forms 

  1. Testa

  2. Tegmen

  3. Perisperm

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

After fertilization process, the different cells in the embryo sac develops to form several parts of the embryo. For instance, the outer integument forms testa, inner integument forms tegmen and ovary wall forms pericarp.

Multiple choice biology reproduction in living organisms growth and development in plants sexual reproduction in plants post fertilization - plants

In angiosperms, triple fusion is necessary for the formation of 

  1. Seed coat

  2. Fruit wall

  3. Embryo

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

The haploid sperm and haploid egg combine to form a diploid zygote, while the other sperm and the two haploid polar nuclei of the large central cell of the megagametophyte form a triploid nucleus. It will later develop into the endosperm, nutrient tissue which provides nourishment to the developing embryo.

Multiple choice biology plants: structure and function growth and development in plants sexual reproduction in plants post fertilization - plants

In which of the following plant, the fruit is a drupe, seed coat is thin, embryo is inconspicuous and endosperm is edible?

  1. Groundnut

  2. Wheat

  3. Apple

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

The fruit of the coconut is a large, dry drupe composed of a thin outer layer (exocarp), a thick, fibrous middle layer called as a mesocarp and a hard inner layer called as an endocarp that surrounds a large seed. A small, cylindrical embryo is embedded in the endosperm nutritive tissue just opposite the functional germination pore. The seed is surrounded by an outer brown layer called as the seed coat or testa.
Thus, the correct answer is option D.