How can emotional expression be explained in terms of evolutionary theory?

How does the aminoacyl trna synthetases recognize which trna gets its amino acid? Define compare and contrast and give examples of natural selection and the impact on allele frequencies through mechanisms such as stabilizing selection directional selection and disruptive selection?In the human brain a great deal of synaptic pruning occurs in early childhood?

What does the fact that many organisms on earth share similar mechanisms of signaltransduction mean with respect to evolution?

Identifying genes like HMGA2 is important, because it is evidence of natural selection. How does it demonstrate that natural selection occurred in Darwin’s finches?   Scientists mutate and modify the gene in the lab to see how changes might occur to the organism. Scientists identify different forms of the gene in individuals from the same species and observe how it shows up as a trait. Scientists study similar genes that also impact the same traits to see how they work together and influence one another. Scientists observe the frequency of the different forms of the gene and how it changes in response to the environment.   Need some help on this one.

Why do traits have to be heritable in order for evolution by natural selection to occur?

results in condensed chromatin, which makes DNA inaccessible, and results in open chromatin, which makes DNA accessible. Oxidation; Nitrification OAcetylation; methylation O Methylation; acetylation O Nitrification; oxidation

Which of the following is LEAST consistent with how behavior tends to evolve? Changes to underlying neural mechanisms, such as neurotransmitter receptors that affect motivation, can result in major changes in behavioral phenotypes Tweaks to the developmental process, such as play or learning, can cause evolutionary divergence in behavior Changes in the properties of sensory receptors can shift preferences and choices Variation in the gene for a given behavior results in population divergence   Why are there biases in learning processes? The initial neural structure underlying learning may not allow every possible learned association Some cues are more likely than others to be associated with particular things, which has shaped the evolution of neural networks that represent the world Reducing the range of possible things a brain can learn can be one way to reduce the costs of learning All of the above

Anatomical Definition: Anatomical evidence for evolution is... How evidence supports evolution: This evidence shows that living things change over time (evolution) because... Real-World Example: An animal that you can see this evidence for evolution in is... Picture/Diagram rces of

Domestic cats could they evolve to gain more social like dogs to gain more pack hunters or evolve to gain less independence to be like dog like personalities for affection for people?

Background: In class we did a project about m and m’s and there ability to evolve and natural selection. (Yes I know they can’t actually evolve it was just used as a example in class) however I can’t figure out this question. Occasionally a mutant may occur and produce a candy that is misshapen or Pointier or flatter than the rest. Often this proves to be a weakness, but a rare mutation may confer extra M&M durability. Other mutations in M&Ms could occur ( like ones that result in a new color). A mutant un you population represents a new _________. What goes in the blank