Dna is copied in a cell before a cell divides. Two nucleotide strands of original double helix separate along the strands. ... They move along the DNA molecule breaking the hydrogen bonds between the complementary nitrogen bases. Replication fork- y shaped region that results when two strands separate.
The shorter the food chain, the larger amount of energy obtained.
Hence, the consumer furthest away from the producer obtains the least energy.
The quaternary consumer is furthest away. Most energy is lost by then. Hence, it has access to the smallest supply of energy.
Answer:
Adding filter media, rocks, or substrate from an existing tank is one of the most effective things you can do to speed up the nitrogen cycle in your aquarium.
Explanation:
Natural selection only acts on the population’s heritable traits: selecting for beneficial alleles and thus increasing their frequency in the population while selecting against deleterious alleles and thereby decreasing their frequency