Answer:
C
Explanation:
Organisms that existed million years ago were mostly soft-bodied, thus they left no traces behind when they died. Due to geological processes such as soil erosion, whatever evidence left behind by these soft-bodied organisms was destroyed.
Answer:
B
Explanation:
go with your gut - Frank
Answer:
Evaporation of ocean water and formation of sea ice both increase the salinity of the ocean. However these "salinity raising" factors are continually counterbalanced by processes that decrease salinity such as the continuous input of fresh water from rivers, precipitation of rain and snow, and melting of ice.
Explanation:
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The Krebs Cycle occurs in the matrix of the mitochondrion of a eukaryotic cell, which is a part of the process of cellular respiration, generating energy for the cell.
The Krebs cycle, also known as the citric acid cycle or the tricarboxylic acid (TCA) cycle, takes place in the matrix of the mitochondrion of a eukaryotic cell. This cycle is a crucial part of cellular respiration, the process by which cells generate energy. During the Krebs cycle, the pyruvate molecules derived from glucose are oxidized and, in turn, produce ATP (adenosine triphosphate), the main source of cellular energy, and other high-energy compounds. The matrix of the mitochondrion provides the necessary environment and enzymes for this cycle to occur effectively.
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A. mark and recapture
B. indirect
C. sampling
D. direct
Answer:
The answer is B. Indirect!
Explanation:
Galapagosfinches evolved partly due to variation and competition. When there is variation within a species and competition for resources, the individuals with the best adaptations to their environment are more likely to survive and reproduce.
This is because they are better able to find food, water, and nesting sites, and they are less likely to be killed by predators.
Variation refers to the differences between individuals within a species. These differences can be caused by mutations, which are changes in the DNA of an individual. Mutations can be beneficial, harmful, or neutral.
Competition refers to the struggle between individuals for limited resources. In the case of Galapagos finches, the limited resources are food, water, and nesting sites.
Over time, the accumulation of beneficial mutations and the elimination of harmful mutations can lead to the evolution of new species. This is what happened with Galapagos finches.
The original finches that arrived on the islands were able to survive and reproduce, but they faced different challenges in different parts of the islands.
The finches that were best adapted to their environment were more likely to survive and reproduce, and over time, these finches evolved into different species.
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