1. Which of the following statements is NOT true about the characterization of l

Question

1. Which of the following statements is NOT true about the characterization of life:

Select one:

a. Living things maintain a balanced internal environment

b. All living things reproduce by making an exact copy of itself

c. Organisms extract energy from nutrients which allos them to grow.

d. All cells come from preexisting cells

2.

The size of an ecosystem varies according to how you define it.

Select one:

a. True

b. False

3.

In a double blind clinical trial, both the study participants and the people running the study don't know which people are receiving the experimental drug and which are receiving the placebo.

Select one:

True

False

Explanation / Answer

1. b. All living things reproduce by making an exact copy of itself

An exact copy of living organism is made when asexual reproduction occurs. Since many organisms reproduce by sexual reproduction which causes variation therefore, this statement is false and not all organisms make exact copy after reproduction.

2. a. True

Yes, the size varies as to how ecosystem is defined and what is considered as an ecosytem. For example: An entire rainforest can be called an ecosystem or the body of an animal can be considered as an ecosystem. When ecosystem is defined in this way then size varies with that.

3. True

In double blind clinical trial both the researcher and the patient are blinded which means that neither the researcher nor the patient is aware that which group is test group (receiving experimental drug) and which is control group (receiving placebo).

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