Evolution 1 - Introduction to Evolution Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What are the 2 common meanings of Theory? (2 points with a total of 4 subpoints)

A
  1. Everyday meaning = an educated guess.
    a. In science, that is called a hypothesis or prediction.
  2. Scientific meaning = an explanatory model that accounts for a VERY large body of evidence.
    a. Cell Theory
    b. Atomic Theory
    c. Theory of Gravity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a scientific theory founded on?

A

Unlike tentative guesses, a scientific theory is found on a large body of evidence that gives scientists great confidence in the theory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What does a scientific theory being founded on a large body of evidence, which gives scientists great confidence in the theory, not mean?

A

It does not mean that these theories are complete or perfectly accurate.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What are all scientific theories considered as?

A

Tentative and open for revision and refinement as new evidence is gathered.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Even though all scientific theories are tentative and open for revision and refinement as new evidence is gathered, what would scientists be shocked to find? (3 points)

A

-An animal without DNA.
-An atom without electrons.
-Or an apple that “fell up.”

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does it mean when something is a fact?

A

It suggests that it is absolute, and not subject to change.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does science not like?

A

Absolutes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the definition of a fact?

A

An observation that has been confirmed repeatedly and is accepted as true (although its truth is never final)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What term do scientists prefer to use?

A

Observations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Write how it change the tone of sentences that describe how the sky is blue. (2 points)

A
  1. It is fact that the sky is blue.
  2. I observe the sky is blue.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Evolution Definition

A

The cumulative change in the heritable characteristics of populations that occurs over successive generations.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Who cannot evolve?

A

Individuals cannot evolve?

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why can’t individuals evolve?

A

Individuals cannot change their genes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Who can evolve?

A

Populations are the smallest unit that can evolve.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Why can populations evolve?

A

Populations can have a shift in their gene pool.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Why would populations evolve? (2 points)

A

-A population evolves so it can become better suited to its habitat.
-This would result in increased survival and a better chance of passing on characteristics to offspring.

17
Q

How long does evolution take place for?

A

It takes place over many generations.

18
Q

How does a population evolve?

A

A shift in the gene pool occurs so that individuals have a particular adaptation.

19
Q

Adaptation Definition

A

A particular structure, physiology, or behaviour that helps an organism survive and reproduce in a particular environment.

20
Q

What are examples of adaptation?

A

Examples of adaptations include camouflage, a superb sense of smell, and bill shape.

21
Q

What is the first misunderstanding/myth regarding evolution? (3 points)

A

-If humans evolved from monkeys, why are there still monkeys?
-This is also related to the misunderstanding that evolution follows a linear path, that everything is trying to be human - NOT SO -
-There are many kinds of primates, each adapted to its own environment, just like there are many kinds of felines.

22
Q

What is the second misunderstanding/myth regarding evolution? (5 points)

A

Myth 2: Scientists regularly debate where evolution occurs.
-The only place debate occurs is in social setting, and is philosophical in nature.
-If any debate occurs among biologists, it’s often regarding specifics such as timing, or what animal is related to what, or when did a creature evolve and what is its origins.
-As a Theory, evolution is supported by a large body of evidence and is used to EXPLAIN new observations.
-Biologists would consider it a waste of time to debate this.

23
Q

What is the third misunderstanding/myth regarding evolution? (4 points)

A

Myth 3: -A person cannot believe in God and in evolution.
-There are many scientists who have religious beliefs.
-One does not necessarily preclude the other.
-To say that the two are incompatible is unfair to both scientists and people of faith.

24
Q

What is the fourth misunderstanding/myth regarding evolution? (3 points)

A

Myth 4: - Survival of the fittest encourages the strong to destroy the weak.
- The words, “strong” and “weak” are relative.
- Organisms do not have to be strong to survive

25
Q

What is the fifth misunderstanding/myth regarding evolution? (3 points)

A

Myth 5: -As organisms evolved, structures became more sophisticated and intelligent.
-For example, the retina is essentially backwards with blood vessels and nerve on the surface, creating a blind spot at the convergence of the retinal nerve.
-Also, as an example, the pharynx is a tube that connects the oral cavity to both the trachea and the esophagus.