Sexual Reproduction in Flowering Plants Test - 76

• The pollen grains which are very light in weight can be passed on by wind from one flower to another or to the stigma of the same flower. This is known as wind pollination. 
• They produce lightweight pollens in large numbers and do not produce vectors. The stigma is sticky.

Adventive embryos, arise from tissues outside the embryo sac and they enter the embryo sac where they grow to maturity. Adventive embryos differ from sexual embryos in having a lateral position, irregular shape, and lack of suspensor. Adventive embryos, which inherit characters of the maternal parent, have been used to provide genetically uniform seedlings of mango and citrus.

Plumule- Shoot tip.

Seeds, which store food materials in their cotyledons are called non- endospermic or exalbuminous seeds. (e,g., gram, pea, bean, almond, groundnut).

Seeds, which store food materials in their endosperm are called endospermic or albuminous seeds. (e.g., castor, maize, wheat, barley, grasses). So, the correct answer is 'All of the above'.

The Yucca moth is also termed as the Pronuba moth. It is a small white moth that lives in the semi-arid habitats where Yucca plants grow. The Yucca moth is well-known for its relationship with the Yucca plant. The Yucca moth’s larvae are relying on the seeds of the Yucca plant as a primary food source. No one can exist without the other, creating an obligate mutualism between the moth and the plant. It is true for types of Yucca moths such as Tegeticula .

 So correct answer is option B.

 The wind pollination uses the pollinating agent as the wind and it is the only type of pollination mostly found in the monocots. So, wheat is also a monocot which depend on the wind for its pollination. Usually, insect pollination occurs in the flowers where there is presence of nectar and scents. Monocots don't have any nectar and scents in their flowers and so can't attract insects towards them and there is no chance of insect pollination in the monocots like the wheat. The bud pollination occurs inside the buds which is not present in the wheat. Herkogamy  is the method where there is an interference between the stamens and carpel of the same flower to avoid the self pollination and it is not any kind of pollination.

Many flowers produce nectar. When an insect lands on a flower to feed, pollen grains stick to its body. As the insect moves to another flower of the same species, these pollen grains are transferred to the flower’s stigma and pollination occurs.