The first organisms to colonize any newly available area would be called Pioneer Species.
Answer:
D - Technology has changed over the years, but parents still worry about it.
The answer is D because in both of the light pink boxes, it says that the parents are concerned about it, and in the first pink box it talks about the radio and then in the next box it talks about video games, TV, and the internet, which is showing that technology has improved over time.
A and B are wrong because neither of the two pink boxes talk about the year(s) it took place, so the main idea isn't based of of those two. C is wrong because neither of the two pink boxes talk about the dangers of being online. But D is the only option that is included in both boxes, so D is correct.
Answer:
A. Heritable
C. Affected by the MC1R gene
D. Polygenic trait
Has evolved due to evolutionary processes such as natural selection.
Explanation:
Human skin color is a polygenic trait as it is regulated by more than one gene. Each allele of these genes has an additive effect on the overall skin color of an individual. Therefore, the trait is a continuous trait, not a discrete one. The genes for human skin color are transmitted from parents to progeny which in turn makes it a heritable trait.
The gene MC1R codes for melanocortin 1 receptor and thereby, regulate the skin color of humans since melanocyte-stimulating hormone binds to the receptor to trigger the synthesis of melanin from melanocytes. Evolution of various skin color in human beings is regulated by natural selection which in turn favors the skin tone best suited under the prevailing climatic conditions of a particular human population
Answer: In light-dependent reactions, the energy from sunlight is absorbed by chlorophyll and converted into chemical energy in the form of electron carrier molecules like ATP and NADPH. Light energy is harnessed in Photosystems I and II, both of which are present in the thylakoid membranes of chloroplasts.
Explanation: