Answer:
prokaryotes
Explanation:
prokaryotes where the earliest life forms ,simple creatures that fed on carbon compounds that were accumulating an Earth's early.slowly other organisms evolve that use the sun's energy along with compounds such as sulfides to generate their own energy.
Answer:
The transfer of mature pollen grain from anther of the flower to the stigma of the same flower of the same [species is called self pollination.
Generally, the transfer of pollen grains by wind,animals,and water to stigmas is called pollination. It is a means of vegetative propagation which ensures reproduction.
Therefore during self pollination, the same genes are distributed from one generation to another. Thus genetic purity is ensured. It also ensured reproductive success. because there is little chance of the pollen grain getting lost in transit. It is also certain a particular plant would always breed true.
Additionally it prevent the process of transfer of genes in some transgenic crops( rice, maize) where through genetic engineering some genes are introduced in their genome.
The only negative effect is lack of genetic diversity. Therefore after a period of time the plants get weak and prone to diseases and infection. Because of poor resistant from lack of variation.
Explanation:
Answer:
0.1460
Explanation:
Total population size= 411 + 911 + 800 = 2122
Let's assume that the population is in Hardy Weinberg Equilibrium.
Under these conditions, frequency of recessive allele (a)= 911 x 2 + 800 / 2122 x 2 = 2622/4244= 0.6178
.
This is because each homozygous recessive genotype has two copies of the recessive allele while each heterozygous dominant genotype has one copy of the recessive allele.
For this population to be under Hardy Weinberg Equilibrium, frequency of dominant allele (A) = 1- 0.6178= 0.3822
Frequency of homozygous dominant genotype (AA) = 0.1460
They are considered so because are the indispensable parts of the nature cycle.Without formation,decay cannot be possible and similarly,formation cannot be possible without decay.In addition to this,THEY ARE IN A CHRONOLOGICAL MANNER SET BY NATURE and that's why cannot be seperated and so together constitute the cycle of nature.
Exposure to infrared light can heat the lens of the eye and produce cataracts over the long term.