Unlike the other vascular plants, the flowering plants and conifers, where the adult plant grows immediately from the seed, ferns reproduce from spores and an intermediate plant stage called a gametophyte. Spores explode when they are mature by releasing a dark brown, dust-like substance. When they come in contact with warm and moist soil, they begin the process of reproduction.

Correct Option: C

Unlike the other vascular plants, the flowering plants and conifers, where the adult plant grows immediately from the seed, ferns reproduce from spores and an intermediate plant stage called a gametophyte. Spores explode when they are mature by releasing a dark brown, dust-like substance. When they come in contact with warm and moist soil, they begin the process of reproduction.

Glucose from glycogen is readily mobilized and is therefore a good source of energy for sudden, strenuous activity. Glucose that is not needed for energy is stored in the form of glycogen as a source of potential energy, readily available when needed. Most of the glycogen is stored in the liver and muscle cells. When these and other body cells are saturated with glycogen, the excess glucose is converted into fat and stored as adipose tissue.

Correct Option: D

Glucose from glycogen is readily mobilized and is therefore a good source of energy for sudden, strenuous activity. Glucose that is not needed for energy is stored in the form of glycogen as a source of potential energy, readily available when needed. Most of the glycogen is stored in the liver and muscle cells. When these and other body cells are saturated with glycogen, the excess glucose is converted into fat and stored as adipose tissue.

There are 7 essential plant nutrient elements defined as micro nutrients [boron (B), zinc (Zn), manganese (Mn), iron (Fe), copper (Cu), molybdenum (Mo), chlorine (Cl)]. A primary function of boron is related to cell wall formation, so boron-deficient plants may be stunted. Sugar transport in plants, flower retention and pollen formation and germination also are affected by boron. Seed and grain production are reduced with low boron supply.

Correct Option: D

There are 7 essential plant nutrient elements defined as micro nutrients [boron (B), zinc (Zn), manganese (Mn), iron (Fe), copper (Cu), molybdenum (Mo), chlorine (Cl)]. A primary function of boron is related to cell wall formation, so boron-deficient plants may be stunted. Sugar transport in plants, flower retention and pollen formation and germination also are affected by boron. Seed and grain production are reduced with low boron supply.

The stigma is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. The stigma receives pollen at pollination and it is on the stigma that the pollen grain germinates. The style connects the stigma to the ovary.

Correct Option: C

The stigma is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower. The stigma receives pollen at pollination and it is on the stigma that the pollen grain germinates. The style connects the stigma to the ovary.

Reflex actions are automatic, rapid and spontaneous and we do not have control over such actions. These are controlled by the spinal cord. They are not controlled by the brain.

Correct Option: B

Reflex actions are automatic, rapid and spontaneous and we do not have control over such actions. These are controlled by the spinal cord. They are not controlled by the brain.