First one i thnk???
brainliest
Plates at our planet's surface move because of the intense heat in the earth's core that causes molten rock in the mantel layer to move.It moves in a pattern called a convection cell forms when warm material rises,cools,and eventually sink down.
Answer:
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Explanation:
Evolution, in genetic terms, involves a change in the frequency of alleles in a population over time. What are the sources of genetic variation? Three sources of genetic variation are mutation, genetic recombination during sexual reproduction and lateral gene transfer.
Answer:
the maintenance of constant osmotic pressure in the fluids of an organism by the control of water and salt concentrations.
Explanation:
for self pollination, pollen grains are transferred to the stigma of another plant on the same species while on cross pollination is transferred to the stigma of another plant on a different species of plant.
