Answer:
Electromagnatic waves.
Explanation:
The energy from the sun is transferred to the earth surface in the form of heat and light. This done through radiation and convection methods heat from the sun is transported to the earth surface through radiation and convection techniques while the light is being transferred.
Answer: The correct statements are 1 and 2:
1.Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant.
2.Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species.
Explanation:
Pollination is the transfer of pollen grains from an anthers to a receptive stigma. In most species of flowering plants, external agents bring about pollination. Also, flowers have evolved special structures and mechanisms to ensure successful pollination.
There are two types of pollination
--> Self pollination: This takes place when mature pollen grains from the anther of a flower fall on the stigma of the same flower or that of another flower on the same plant. This type of pollination brings the male gametes and egg cells of the same plant together. The resultant offspring show very little genetic variation.
--> Cross pollination: This occurs when mature pollen grains of a flower are transferred to the stigma of a flower of another plant of the same or closely related species. This brings the male gametes and egg cells of two different parent plants together. Therefore, there is greater genetic variation among the offspring.
It is during G1 phase that a a cell release cdks to initiate the events for cell division. At this stage, b<span>iochemical triggers known as </span>cyclin-dependent kinases<span> (Cdks) switch on cell cycles events at the corrected time and in the correct order to prevent any mistakes.</span>
