Answer:eukaryotic cells
Explanation:One of the main differences between prokaryotic and eukaryotic cells is the nucleus. Also prokaryotic cells lack an organized nucleus while eukaryotic cells contain membrane-bound nuclei (and organelles ) that house the cell's DNA and direct the synthesis of ribosomes and proteins.
Answer:
C. different alleles of the same gene
The answer is gene pool, evolution, natural selection, and mutations.
Answer:
Explanation:
Fossils provide a wide array of useful information to archaeologists. Aside from revealing the body structures of ancient organisms they also indicate the era in which the organism existed using the fossils carbon data. Also fossils can also help us understand how an organism survived and it's relationship to other plants and animals from the same time period. All of this information provides scientists with a clearer understanding of how are planet was in the past.
Answer:
Energy flow in an ecosystem is unidirectional. It means that energy which is absorbed by the producers from sun and is converted into chemical energy, always flow from a lower trophic level to a higher trophic level as in a food chain when herbivore consumes producers the energy is transferred from producers to consumers and so on. Some of this energy is assimilated some is used by the organism and some is dessipated in the environment but the flow of energy is never reverted, that is obviously a producer can not consume a consumer.