Question

In what way is artificial selection different from natural selection?

Question 1 options:

	A.    There is no difference; both have caused evolution throughout the history of life on earth
	B.    Artificial selection applies to changes in domestic animals only, while natural selection applies to all other species
	C.    In artificial selection, human preference is the selecting force; in natural selection, environmental conditions are the selecting force.
	D.    Artificial selection causes one species to change to another, while natural selection only modifies existing species.
	E.    Artificial selection is only temporary; once selection ends, the population reverts back to the original type.

Question 2 (1 point)

Saved

A substance with a pH greater than 7 is ___________, while a substance with a pH less that 7 is ___________.

Question 2 options:

	A ) basic, acidic
	B ) acidic, basic
	C ) basic, neutral
	D ) neutral, acidic
	E ) neutral, basic

Question 3 (2 points)

Saved

Humans are composed of ______ cells.

Question 3 options:

	A ) prokaryotic
	B ) bacterial
	C ) eukaryotic
	D ) viral
	E ) fungal

Question 4 (1 point)

Saved

What are the monomer 'building blocks' that make up proteins?

Question 4 options:

	A.    Monosaccharides
	B.    Glycerol molecules
	C.    Amino acids
	D.    Fatty acids
	E.    Cholesterol molecules

Question 5 (2 points)

Which of the following is not a product of cellular respiration?

Question 5 options:

	carbon dioxide
	water
	sugar
	energy
	carbon dioxide and sugar

Question 6 (2 points)

If life on another planet were fundamentally like life on earth, the macromolecules of living things would be based on which element?

Question 6 options:

	A.    Carbon
	B.    Hydrogen
	C.    Nitrogen
	D.    Oxygen
	E.    Phosphorus

Question 7 (1 point)

Which of the terms below include all the other terms?

Question 7 options:

	Atom
	Molecule
	Electron
	Element

Question 8 (1 point)

What is the result of DNA replication?

Question 8 options:

	One single stranded RNA molecule
	One single stranded DNA molecule
	Two DNA molecules, each of which is half-new and half-old DNA
	One new double stranded DNA molecule

Question 9 (1 point)

You examine a cell under a microscope and you do not see a well-defined nucleus. What type of cell is this?

Question 9 options:

	Prokaryotic
	Eukaryotic
	Plant
	Animal

Question 10 (2 points)

All of the following are common or recurrent themes in biology except?

Question 10 options:

	Organisms grow, develop, and reproduce
	Function determines structure
	Matter is recycled while energy flows through living systems
	Living organisms maintain homeostasis
	Evolutionary processes explain both the unity and adaptive diversity of life
	Life's components are interconnected and interdependent

Question 11 (1 point)

Which organelle contains digestive enzymes that may degrade different kinds of macromolecules?

Question 11 options:

	Chloroplast
	Endoplasmic reticulum
	Mitochondrion
	Lysosome
	Golgi body

Question 12 (1 point)

Most carbohydrates in the human body are ___________________________.

Question 12 options:

	A ) used as building blocks for proteins
	B ) used as catalysts for reactions in cells
	C ) consumed as a source of energy
	D ) not easily absorbed into the bloodstream
	E ) not necessary for regular bodily functions

Question 13 (1 point)

When a biologist studies the way organisms interact with each other and with their environment, they are studying their____________________.

Question 13 options:

	A ) physiology
	B ) anatomy
	C ) chemistry
	D ) genetics
	E ) ecology

Question 14 (2 points)

In humans, the allele for dimples (D) is dominant. The allele for not having dimples (d) is recessive. If a woman (DD) and a man (Dd) have four children, how many of the children will not have dimples?

Question 14 options:

	0, all will have dimples
	1
	2
	3
	4

Question 15 (2 points)

How does high heat impact most enzymes?

Question 15 options:

	Enzyme activity is decreased due to hydrolysis
	Enzymes are inactivated due to denaturation
	Enzyme activity is increased due to saturation
	Since enzymes are temperature independent activity will remain the same.

Question 16 (1 point)

Which of the following situations has the greatest potential for observer bias in an experimental study?

Question 16 options:

	Ms McCormack is an outside consultant who is conducting a health and wellness survey for a pharmaceutical company. She neither knows the name of the company, nor the name of the drug being tested during the survey
	Graduate student Jonas Brown is conducting a survey of weight loss for his professor. He asks each student in the study the same questions.
	Dr. Smith is analyzing biopsy examples from rats who have been given either a placebo or an experimental drug believed to reduce inflammation. Each sample is identified by a code number; therefore, Dr. Smith cannot tell which treatment each rat received.
	Ms Williamson is a research technician who surveys the responses to a new cold remedy by a study group. She only knows the e-mail address of each participant and asks them identical questions by computer.
	Dr. Jones is evaluating cancer patients for their responses to a new therapeutic drug. She knows which patients are receiving the drug and which patients are receiving the placebo.

Question 17 (1 point)

Consider a cell that underwent mitosis but not cytokinesis. What would the result be?

Question 17 options:

	One cell with one nucleus containing four times the normal number of chromosomes
	One cell with two nuclei, each containing a normal number of chromosomes
	Two daughter cells that are unusually small
	Two daughter cells with no nucleus
	Two daughter cells with twice the number of chromosomes

Question 18 (1 point)

A man carries a harmful sex-linked gene on his X chromosome. Who will he pass this on to?

Question 18 options:

	All of his daughters
	Half of his daughters
	All of his sons
	Half of his sons

Question 19 (2 points)

A group of medical researchers investigated the effects of a drug called PDX on lowering blood pressure in a group of women between the ages of 60 and 80 years old. The researchers did the following experiment and obtained the indicated results: One group of 150 women took a tablet containing PDX for 3 weeks – 95 of these women experienced decreased blood pressure by at least 10%. Another group of 150 women were given a tablet with no added PDX (placebo) for 3 weeks – 10 of these women decreased their blood pressure by 10%. What are the (1) independent and (2) dependent variables in this experiment?

Question 19 options:

	1. Blood pressure; 2. PDX
	1. Blood pressure; 2. Placebo
	1. PDX; 2. blood pressure
	1. The 3 week time period; 2. sample size of 150
	1. PDX; 2. sample size of 150

Question 20 (2 points)

An example of an organism at the second trophic level is

Question 20 options:

	A.    A fish tapework
	B.    A redwood tree
	C.    A tiger
	D.    A cow
	E.    An eagle

Answer 1

Question 1

Artificial selection is a kind of selection which occurs due to preference of human. For example introduction of genes in plants and animals for increasing yield is a kind of artificial selection. Where natural selection occurs by its own in the nature and leads to increase in reproduce fitness in the environment.  

That's why right option is C.

Question 2:

On pH scale, the substances acidic in nature has pH less than 7.

Basic substances has pH more than 7

Neutral substances has 7 pH.

That's why right option is A.

Question 3)

Human body has million of cells. Each cells in a body of human is eukaryotic in nature.

That's why right option is C.

Question 4)

Amino acid is the monomeric sub unit of proteins. These amino acids are joined by peptide bond.

That's why right option is C.

question 5)

Cellular respiration utilises leads to break down of sugar molecules occurs which leads to release of carbondioxide molecules energy and water molecules.

The sugar molecule is not synthesised in the respiraton.

That's why right option is sugar.

question 6)

Oxygen element is necessary for survival of life on earth . That's why other planet should have oxygen element for the presence of living organisms.

That's why right option is D.

Question 7)

Atom contains electrons. Molecule contains two or more different atoms where as molecule of an element has same kinds of atoms.

That's why right option is molecule.

Question 8)

In DNA replication, one newly strand of DNA is synthesised on existing strand.

That's why right option is:

Two DNA molecules, each of which is half-new and half-old DNA

Question 9)

Since nucleus in the cell do not have well defined nuclear membrane. This suggests that this cell is prokaryotic in nature.

That's why right option is prokaryotic.

Question 11)

lysosome contains digestive enzyme which are active in acidic pH.

That's why right option is lysosome.