Answer:
The population of fish with pelvic spines that arrived in the lake at time B evolved a reduced pelvis over time (beginning at time C).
Explanation:
The fossil record showed that before the time period B, the ancient sticklebacks might have had a huge pelvis which was of no use to them. As a result, through evolution at time B the pelvis reduced in the sticklebacks through natural selection. Having a reduced pelvis must have been advantageous for this ancient stickleback population, just as it is for many current freshwater stickleback populations. Hence, the correct option is B.
Light Independent Reaction:)
Cellular respiration is an exothermic process. This is because the breaking of carbon-hydrogen covalent bonds within sugars releases energy
Answer:
2.5 billion years ago.
Explanation:
Evolutionary tree is constructed to understand the phylogeny and evolution relationship of the organism. The evolutionary tree is constructed by looking at the molecular and physiology of the different organisms.
The eukaryotes are more closely related to the archaea. Depending on the biochamical and molecular evidence is has been found that they share the common ancestor almost 2.5 billion years ago. This can also be deduced by the fossil evidence as well.
Thus, the answer is 2.5 billion years ago.
Answer:
The purpose of fungi and algae is to decompose dead plants and animals to break them down into smaller molecules that can be used by other members of the ecosystem
Explanation:
