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Natural selection is best described as

08/11/2021 Client: muhammad11 Deadline: 2 Day

Molecule Is Best Described As A: CH3—CH2—CH2—CH2

Lesson 1 Exam

Question 1 5 / 5 points

1. Which of these would be a valid hypothesis?

Question options:

Human history is determined by a series of supernatural events.

Humans should help in the conservation of other animal species.

Humans are controlled by forces beyond our understanding.

Humans and bacteria share a common genetic code.

Question 2 5 / 5 points

2. The following molecule is best described as a: CH3—CH2—CH2—CH2

Question options:

protein.

carbohydrate.

hydrocarbon.

lipid.

Question 3 5 / 5 points

3. Carbohydrates typically include:

Question options:

an NH2 group.

C, H, and O atoms.

nucleotides.

a PO4 group.

Question 4 5 / 5 points

4. Taxonomy is the:

Question options:

study of cells.

naming and classifying of organisms.

study of organisms and their interaction with the environment.

study of genes.

Question 5 5 / 5 points

5. 66An atom with an electrical charge is a(n):

Question options:

isotope.

molecule.

ion.

compound.

Question 6 5 / 5 points

6. __________ is an example of an element.

Question options:

Water

Carbon

Glucose

Salt

Question 7 5 / 5 points

7. A fat that is hydrogenated is:

Question options:

more unsaturated.

easier to digest.

more solid.

less likely to cause strokes.

Question 8 5 / 5 points

8. Sometimes when I have my morning coffee, which I drink black with no sugar, I notice a thin film floating on top of the coffee. Since I have just read Chapter 3 of the text, I now realize the nature of this substance and so I run to my friend screaming, "Look at this __________ in my coffee!"

Question options:

hydrophilic substance

hydrophobic substance

glucose

nucleotide

Question 9 5 / 5 points

9.How many oxygen atoms are in the products of the following reaction?

C6H12O6 + 6 H2O + 6 O2 → 6 CO2 + 12 H2O

Question options:

18

6

12

24

Question 10 5 / 5 points

10. In what way(s) is the science of biology influencing and changing our culture?

Question options:

By helping us understand the relevance of evolution to human health

By revealing how mutations in genes can lead to disease

By providing new tools for forensic investigations

All of the above

Question 11 5 / 5 points

11. Science is:

Question options:

the inquiry-based effort to describe and explain nature.

the search for truth.

an organized set of principles for how to ethically and morally behave.

All of the above

Question 12 5 / 5 points

12. People with lactose intolerance do not have enough:

Question options:

galactose.

lactase.

glucose.

fructose.

Question 13 5 / 5 points

13. In the following reaction, what type of bond is holding the two atoms together?

K + Cl → K+ + Cl- → KCl

Question options:

Hydrophilic

Ionic

Hydrophobic

Covalent

Question 14 0 / 5 points

14. Which of these is required for natural selection to occur?

Question options:

Inheritance

Unequal reproductive success

Individual variation

All of the above (Incorrect)

Question 15 5 / 5 points

`15. Humans are composed of __________ cells.

Question options:

bacterial

eukaryotic

plant

prokaryotic

Question 16 0 / 5 points

16. The model on the left is not realistic in that:

Question options:

neutrons are not located in the nucleus.

the electrons should be much farther away from the nucleus.

electrons do not orbit the nucleus in a ring shape. (Incorrect)

electrons do not have a negative charge.

Question 17 5 / 5 points

17. Beryllium's atomic mass is 9 and its atomic number is 4. How many neutrons are found in a beryllium atom?

Question options:

9

13

4

5

Question 18 5 / 5 points

18. Which of the following is water hydrophilic?

Question options:

Cellulose

Testosterone

Butter

Cholesterol

Question 19 5 / 5 points

19. A base:

Question options:

removes H2O molecules from a solution.

decreases the pH of a solution.

removes OH ions from a solution. 

removes H+ ions from a solution. 

Question 20 5 / 5 points

20. Which of the following is a health effect of a diet high in saturated fats?

Question options:

Increased blood flow

Decreased risk of atherosclerosis

Increased risk of heart attack

Decreased risk of stroke

a

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