<span>Identical twins are the result of an egg being fertilized by one sperm and then splitting, creating two eggs with identical genetic information. Non-identical twins are formed when two eggs are fertilized by two separate sperm and develop together in the uterus with unique genetic information.</span>
Because it serves as protection for a vital organ in the body. Also if the skull could move it would make the brain very vulnerable.
Answer:
The caterpillars gain energy directly from the orchids
Explanation:
Earth maintains the flow of nutrients in the form of cycles and linear sequence in which the nutrients in the form of matter and energy flows from one organism to another and one sphere to another sphere.
One such flow of nutrients in the form of matter and energy can be observed in the organisms when one organism feed upon another and gain energy.
This flow of matter and energy is called a food chain.
The energy flows in this food chain through ten percent rule which states that only ten percent of energy can be transferred to next trophic level, therefore, the organism at the lowest level will have the highest amount of energy.
In the given question, the caterpillars can be considered as primary consumers which gain energy from the orchid plants directly and thus is the most appropriate answer.
Genetic drift is the change in the gene pool
Explanation:
Both micro and macro evolution depends on processes like natural selection, genetic drift, speciation etc.
Genetic drift is the variations caused in the gene pool due to increase or decrease of alleles over time.
The variations in the phenotypes or traits of the fishes in the net are due to evolutionary adaptations developed over generations. The advantage of a dark color in differential reproduction and survival would have made to pass the dark color to the offsprings in each generation by making it the dominant allele.
Dark color helps the fishes to hide from their predators and also to attract their mates. Due to these reasons, the gene frequency of dark color becomes high and will cause an overall genetic drift in that species of fish.
