Modern geologists estimate that the age of Earth is about A) 4, 500 years. B) 45

Question

Modern geologists estimate that the age of Earth is about A) 4, 500 years. B) 450.000 years. C) 4.5 million years. D) 4.5 billion years. E) 4.5 trillion years. The theory of natural selection stat that A) all individuals live to reproduce in each generation. B) only the largest and strongest individuals survive. C) random assortment of genes results in better physical characteristics in the following generations. D) the most well-adapted individuals in their environments survive and reproduce, contributing the most genes to the next generation. E) individuals that mutate in response to changes in their environment will contribute the most genes to the next generation. Humans still have body hair even though it is greatly reduced and serves little function. The hair is a (n) A) analogous structure. B) homologous structure. C) vestigial structure. D) adaptation. The human upper arm bone (the humerus) is structurally similar to the upper wing bone of a bat. The structural similarity is an example of A) analogous structures. B) homologous structures. C) vestigial structures. D) adaptation. E) mutation. A population is defined as A) all individuals of the same species located throughout the world. B) all individuals of the same species located in a given geographic region. C) all individuals of all species located in a throughout the world. D) all individuals of all species located in a given country. E) those individuals of the same species that have an identical genetic makeup. The amino acid sequences of human and bonobo hemoglobin are almost identical, yet they differ considerably from the sequence of the hemoglobin of wolves. This fact indicates that A) humans are more closely related to wolves than to bonobos. B) wolves and bonobos are closely related. C) bonobos are more closely related to humans than to wolves. D) None of the above

Explanation / Answer

23) the answer is option (b). Homologous structure. It is because both are different and have a different purpose, but both are similar and share common traits among them.

22) the answer is option (c) vestigial organ..

21) the answer is option (d) the best suited animal according to the environment will reproduce and will pass the chararacteristcs to the offspring..

20) the answer is option (d) 4.543 billion years..

24) the answer is option (b) the population is defined as the individual of same species living in particular given geographical area which has the capability of interbreeding..

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