Answer:
e. cutin
Explanation:
Plant exhibit many variations to withstand the temperature variations, desiccation and increased UV exposure which are some of the factors associated with land habitat. Cutin is a waxy substance that is found in the outer walls of the epidermal cells of plants. Cuticle in plants serves to make the outer most covering of aerial parts of the leaves and non-woody stem of herbaceous plants. The cuticle is made of cutin.
Cutin serves to protect the plant’s aerial surfaces from excess water loss. It also filters the excess UV light and thereby protects the underlying plant parts. The thickness of the cuticle varies in different plants depending upon the environmental conditions. The leaves of plants adapted to hot, dry climates have thick cuticles. The thickness of the cutin layer also varies in different parts of a plant. For example, the upper epidermis of leaf generally has a thicker cuticle than the shaded and relatively cooler lower epidermis.
Answer:
Hyperaemia
Explanation:
active process where blood volume + flow is increased by active dilatation of arterioles supplying the tissue
The correct answer is - b) parasitism.
The kudzu is a plant that has adapted to get stuck to the other plants, usually trees and bigger shrubs, and get nutrients and water through them. In this way, the kudzu shows elements of parasitism, as it is using a host plant in order to satisfy its needs.
The native plants and shrubs will have a big problem with an introduction of the kudzu in their environment. They will not have a defense mechanism, and the kudzu will spread out very quickly and suck the nutrients and water out of them, hindering their growth and even killing them over the coarse of longer period of time.
This would be a prime example of parasitic relationship between the kudzu and the native plants.
Answer:
seed cones and pollen cones
Explanation:
In gymnosperms, their reproductive structures include the pollen cones, which produce pollen grains or the male gametophyte; and the seed cones, which produce female gametophyte.
Answer:
Explanation:
The distance to the Sun is 5,890,000,000,000. We need to write this distance in km.
A number can be written as in scientific notation where x is a real no and y is any integer.
There are 10 zeros in the given number and also there are 12 digits after. It would mean that,
So, the distance in scientific notation is :