I believe the gametes are to male and female reproductive cells as Zygotes are to human "blueprints".
Gamete are the cells containing only one set of dissimilar chromosomes, or half the genetic materials necessary to form a complete organisms. They are formed through meiosis, in which the cell undergoes two fission. The gametes combine during the process of fertilization to form a zygote which then undergoes multiple cell divisions and differentiation to form an embryo. <span />
A hypothesis cannot be wrong, because it is an educated guess. You cannot prove a guess wrong. A guess is something you think, and there is no right or wrong answer to thoughts.
Answer:
<em>The correct option is A) an increase in oxygen levels, which led to the extinction of many anaerobic organisms.</em>
Explanation:
Photosynthesis can be described as a process in which food (glucose) is produced by photosynthetic organisms by using carbon dioxide, water along with light energy from the sun. Oxygen is released as a by-product of this reaction. The process of photosynthesis initially allowed for oxygen gas to get accumulated in the air. This caused the rise of aerobic organisms who required oxygen for respiration. Before the photosynthesis organisms evolved, there was not enough oxygen gas on earth to support the life of aerobic organisms.
A curve on a graph that records the situation
DNA replication has such accuracy varies. There are many DNA polymerases/repair enzymes that synthesize/repair DNA. Some are more frequent than others. The error frequency ranges between 1 to per 10,000 base pairs to 1 to per 10,000,000 base pairs, depends on the enzyme