Answer the following question given this paragraph: If evolution can take a very long time, how can we visualize how it happens? Charles Darwin came up with the idea of an evolutionary tree to represent the relationships between different species and their common ancestors ( Figure below ). The base of the tree represents the ancient ancestors of all life. The separation into large branches shows where these original species evolved into new species. Q: Who created the idea of an evolutionary tree to represent the relationships between different species and their common ancestors? Choices: - Carl Sagan - Scopes - Isaac Newton - charles darwin A:
charles darwin
Answer the following question given this paragraph: Homologous chromosomes form a pair, one from each parent. Homologous chromosomes are similar in size and shape, and contain the same genes, though they may have different alleles. Alleles are alternative forms of the same gene. This diagram represents two pairs of homologous chromosomes. Q: What are different forms of the same gene? Choices: - genomes - peptides - nuerons - alleles A:
alleles
Q: Answer the following question given this paragraph: For a star to form, gravity pulls gas and dust into the center of the nebula. As the material becomes denser, the pressure and the temperature increase. When the temperature of the center becomes hot enough, nuclear fusion begins. The ball of gas has become a star!. Q: For a star to form, what force pulls gas and dust into the center of the nebula? Choices: - weight - centrifugal force - motion - gravity A:
A: gravity
Question: Answer the following question given this paragraph: Humid continental climates are found between 40 and 60 north latitude. The northeastern U. S. has this type of climate. Summers are warm to hot, and winters are cold. Precipitation is moderate, and it falls year round. Deciduous trees grow in this climate ( Figure below ). They lose their leaves in the fall and grow new ones in the spring. Q: What do you call trees that lose their leaves in the fall and grow new ones in the spring? Choices: - perennial - fibrous - coniferous - deciduous A:
Answer: deciduous
*Question*
Answer the following question given this paragraph: Macroevolution is evolution over geologic time above the level of the species. One of the main topics in macroevolution is how new species arise. The process by which a new species evolves is called speciation . How does speciation occur? How does one species evolve into two or more new species?. Q: What is the term for evolution over geologic time above the level of the species? Choices: - mutation - speciation - microevolution - macroevolution A:
**Answer**
macroevolution
(Question)
Answer the following question given this paragraph: All mammals have lungs that are the main organs for breathing. Lung capacity has evolved to support the animal's activities. During inhalation, the lungs expand with air, and oxygen diffuses across the lung's surface and enters the bloodstream. During exhalation, the lungs expel air and lung volume decreases. In the next few sections, the process of human breathing will be explained. Q: What are the main organs for breathing in a mammal? Choices: - gills - nostrils - intestines - lungs A:
(Answer)
lungs