A researcher is studying the science of attractiveness and asks volunteer test subjects to rank what trait they find most attractive in a person. What type of variable is the dependent variable in this experiment?
-Categoric
Sunny~ ☺
Explanation:
The evolution of egg was the most important evolutionary incident which allowed the evolution of the terrestrial animals. The amnion is the layer inside the chorion of the egg which keeps the embryo from drying out.
The formation of this layer completely removed the dependency of the organism to lay their eggs in the water to keep them wet.
This layer allowed the reptiles to lay their eggs on the land as the amnion can protect the embryo from drying out. The other layer of eggs protects the egg from the predators and the pathogens.
Thus, the evolution of the amniotic egg is very important from the evolutionary perspective.
This suggests that the knowledge we know about these species is very limited. Through deeper research and gaining of samples of these bacteria, scientists will be able to determine how to culture these prokaryotes better, but this would still take a long period of time.
For diffusion to occur there needs to be a concentration gradient. Which means that the concentrations on the two sides must be different. In diffusion the particles flow from high concentration to low concentration.
Answer:
Explanation:
DNA mutations could be silent and have no effect, others affect protein synthesis. Mutation is a change in a DNA sequence brought about either by a mistake made when the DNA is copied or through chemical damage.
A point mutation is a single-letter swap – an exchange of two bases, adenine to cytosine, for example, at a single location in the DNA molecule. Since the sequence of letters in a gene determines the sequence of amino acids in the protein it encodes, a point mutation can change the amino acid sequence of the resulting protein. Sometimes a change in the protein's amino acid sequence can have dramatic results. For example, sickle cell disease occurs when a single-point mutation in the gene that encodes the hemoglobin molecule results in deformed red blood cells.
