Answer:
(B) Similarities among Hox genes suggest that they all arose from a single ancestral gene that duplicated many times.
Explanation:
Hox genes are arranged in clusters and their order on the chromosome is the same as the order in which they are expressed along the body during development.
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i believe the correct answers are:
1) B. homologous
2) A. analogous
The universe is defined as all the space, matter, and all forms of energy existing together. The formation of the universe is explained by the Big Bang theory.
The statements about the universe that are correct:
- dark matter exists
- the invisible matter must be influencing the rotation of galaxies
- galaxies spin faster than they should be based on visible matter
Scientists and advancements in research show that dark matter exists in the universe, but scientists are not sure about the composition of dark matter.
The spiral galaxies generally rotate at a speed proportional to the amount of visible matter. Recent research has shown that super spirals are rotating must faster than the predicted visible mass and have a high ratio of dark matter.
Thus, statements 1, 3, and 4 are correct.
To know more about the universe, refer to the following link:
brainly.com/question/9724831
<em>Answer: Exothermic
</em>
<em>Explanation: Chemical reactions that release energy are called exothermic. In exothermic reactions, more energy is released when the bonds are formed in the products than is used to break the bonds in the reactants. Exothermic reactions are accompanied by an increase in temperature of the reaction mixture.</em>
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