Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology 2015/16 > 9 Weeks Test > Flashcards

9 Weeks Test Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

What is NOT the goal of science?

A

The goal is not guesswork based on opinions we can’t explain

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

What are the steps of an experiment?

A

purpose, hypothesis, research, testing/experimenting, observe, coclusion

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

What is a hypothesis?

A

A proposed scientific explanation for a set of observations.

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

What is a controlled experiment?

A

A controlled experiment is when only one variable is changed at a time in an experiment.

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

Why do scientists publish their experiments?

A

Scientists publish their experiments so other scientists can see if they had the same results.

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

What is a theory?

A

When a hypothesis becomes well-supported

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

What is the definition of biology?

A

The science that seeks to understand the living world.

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

What are the seven characteristics of living things?

A 
Living things are made up of units called cells;
reproduce;
are based on a universal genetic code; 
grow and develop; 
obtain and use materials and energy;
respond to their environment;
maintain a stable internal environment;
mature over time
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is homeostasis?

A

The process by which organisms keep internal conditions fairly constant.

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

What is metabolism?

A

The combination of chemical reactions through which an organism builds up or breaks down materials.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the metric system based on?

A

Multiples of ten

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

What is a device that produces magnified images of structures that are too small to see with the unaided eye?

A

Microscopes

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

These allow light to pass through the specimen and use two lenses to form an image.

A

Compound light microscopes

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

These shine a beam of electrons through a thin specimen.

A

Transmission Electron Microscopes

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

These scan a narrow beam of electrons back and forth across the surface of a specimen.

A

Scanning Electron Microscopes

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

What is cell culture?

A

A group of cells developed from a single original cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is cell fractionation?

A

A technique used to separate parts of a cell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is an inference?

A

A logical interpretation based on prior knowledge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is a cell?

A

The smallest units of an organism considered to be alive.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is data?

A

The information gathered from observation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is spontaneous generation?

A

The idea that life can arise from nonliving matter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the manipulated variable?

A

The variable that is deliberately changed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is the responding variable?

A

The variable that is observed and changes in response to the manipulated variable

24
Q

Which three particles make up an atom?

A

The proton, the neutron, the electron

25
Q

Where are protons, electrons, and neutrons located in the atom?

A

Protons and neutrons are in the nucleus; electrons orbit the nucleus

26
Q

How do you find the number of protons, neutrons, and electrons in an atom?

A

Atomic number is how many protons, protons = electrons, neutrons = atomic mass - atomic number

27
Q

What are the first ten elements in the periodic table?

A

Hydrogen - 1, helium - 4, lithium - 7, beryllium - 9, boron - 10, carbon - 12, nitrogen - 14, oxygen - 16, fluorine - 19, neon - 20

28
Q

What is the basic unit of matter?

A

An atom

29
Q

What is an element?

A

A pure substance that consists entirely of one type of atom.

30
Q

What is an isotope?

A

Atoms of the same element that have different numbers of neutrons

31
Q

What are the charges of protons, neutrons, and electrons?

A

Positive, neutral, and negative, respectively

32
Q

What is the difference between a covalent bond and ionic bond?

A

Ionic bonds are when electrons are transferred between atoms while covalent bonds are when electrons are shared.

33
Q

What is the biosphere?

A

Combined portions of the planet in which all life exists

34
Q

What is a species?

A

A group of organisms so similar to one another they can breed and produce fertile offspring.

35
Q

What is a population?

A

Groups of individuals that belong to the same species

36
Q

What is a community?

A

Assemblages of different populations that live together in a defined area

37
Q

What is an ecosystem?

A

A collection of all the organisms that live in a particular place

38
Q

What is a biome?

A

A group of ecosystems that have the same climate and dominant communities

39
Q

What is the original source of energy in most ecosystems?

A

The sun

40
Q

What is an autotroph?

A

An organism that produces its own food

41
Q

What is a heterotroph?

A

An organism that relies on other organisms for food

42
Q

What is a food chain?

A

A series of steps in which organisms transfer energy by eating and being eaten

43
Q

What is a food web?

A

A network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem

44
Q

What is a trophic level?

A

Each step in a food chain or web

45
Q

What is an ecological pyramid?

A

A diagram that shows the relative abounds of energy or matter in each trophic level

46
Q

What is a biomass pyramid?

A

Pyramid that represents the amount of potential food available for each trophic level

47
Q

What is photosynthesis?

A

When autotrophs use light energy to convert carbon dioxide and water into oxygen and carbohydrates

48
Q

What is chemosynthesis?

A

When organisms use chemical energy to make carbohydrates

49
Q

What is the bottom level of an ecological pyramid?

A

Producers

50
Q

How much energy is passed on from trophic level to trophic level?

A

10%

51
Q

Why is only 10% of energy passed on to the next trophic level?

A

Consumers use much of the energy they consume

52
Q

What is nitrogen fixation?

A

Bacteria convert nitrogen GAS INTO AMMONIA

53
Q

What is denitrification?

A

Bacteria convert NITRATES INTO NITROGEN GAS

54
Q

What is the primary productivity of an ecosystem?

A

The rate at which organic matter is created by producers

55
Q

What is a limiting nutrient?

A

A nutrient that is scarce or cycles very slowly; this limits organisms’ growth, or, when the organism is given a large amount of a limiting nutrient it can cause an algal bloom

56
Q

What is the goal of science?

A

To investigate and understand the natural world, to explain events in the natural world, and to use those explanations to make useful predictions.

Biology 2015/16 (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions