Answer:
1. Adaptive radiation: A pattern of evolution in which slightly different species evolve from one common ancestor.
2. Coevolution: A pattern of evolution in which two species evolve in relation to each other.
3. Convergent evolution: A pattern of evolution in which similar characteristics evolve between two unrelated species.
4. Divergent evolution: A pattern of evolution in which very different species evolve from one common ancestor.
5. Gradualism: A theory of evolution that states that a species evolves by consistent, small, steps.
6. Punctuated equilibrium: A theory of evolution that states that a species evolves in spurts of rapid change and then no change.
The minimum legth of a codon could be two. If it was only one of the 6 nitrogeneous bases in a codon, we'd only have 6 possible amino acids. If we have, though, a combination of two amino acids out of the 6 nitrogeneous bases, we would have then 36 possible combinations (6 possibilities for the first position × 6 possibilities for the second position) that would allow the existence of the 20 different amino acids.
In the human case, for example, with only 4 nitrogeneous bases, a combination of two amino acids would be insufficient (4×4=16) for the 20 amino acids.
Answer:
Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.
Answer:
D diffusion across a membrane
Explanation:
Based on whether or not energy input is required, there are two types of processes viz: passive and active. Passive processes are those that do not require energy input in form of ATP while active processes require energy input to occur.
An example of passive process is DIFFUSION, which is the movement of molecules from a region of high concentration to a region of low concentration across a membrane. Diffusion is passive i.e does not require energy, because movement occurs down a concentration gradient.
Other processes in the options like cell division, DNA replication and protein synthesis all require energy input to occur.
