Darwin noticed that there were different kinds of the same species. For example, he studied four different kinds of finches. Each one had a different beak and are different kinds of food. This was the first time genetic diversity had been so obvious to humans.
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.
Step 1: 405kpa times 4cm^3 so 405/4=1620
Step 2: 1620 divide 6 so 1620/6=270
The final answer is 270Kpa
Somatic mutation is the type of mutation among the choices given in the question that <span>contribute to evolution. The correct option among all the options that are given in the question is the second option or the penultimate option. I hope that this is the answer that has actually come to your desired help.</span>
Answer:
Geological processes" are defined as the natural forces that changes the shape of Earth. Several geological processes include erosion, sedimentation and chemical weathering that affect the Earth’s surface.
So, the geological processes such as plate tectonics and erosion et-cetra are occurring long time and still occurring in the Earth environment.
