essential of biology 5th edition answer sheets Choose the best answer for each q

Question

essential of biology 5th edition answer sheets

Choose the best answer for each question. 1.1 The Characteristics of Life 1. A modification that helps equip organisms for their way of lif a, homeostasis b, natural selection. e, adaptation. d, extinction. 2. All of the chemical reactions that occur in a cell are called a, homeostasis b. metabolism. e, heterostasis. d. cytoplasm. 3. Which of the following represents the lowest level of biological organization that still may be considered alive? a, tissue b, molecule c. cell d. population 4. The region of the Earth's surface where all organisms are found is cal c. community d. biosphere a, ecosystem b. population. 1.2 Evolution: The Core Concept of Biology S. The mechanism by which species undergo evolutionary change is ca a. behavior b, homeostasis c, natural selection d. systematics 6. Which of the following is not a domain?

Explanation / Answer

1. Answer is Adaptation - it is a change in the organism which helps the organism for better survival.

Homeostasis is maintaining constant internal environment.

Extinction is when the organism is no more to be seen on Earth.

2.metabolism - it is sum of anabolism and catabolism.

Anabolism means synthesis and catabolism means breakdown.

3. Cell- it is the basic unit of life.

Cells combine to form tissues and tissues combine to form organ and organ combine to form organism.

4. Biosphere- all the living organisms live over here.

5. Natural selection- it is the survival of the fittest. The organisms evolve due to natural selection.

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