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ISTEP Review
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Biology
Flashcards
65 cards
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Practice quiz
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Questions
65
Answers
1
Which organelle breaks down organelles that are no longer useful?
mitochondria
endoplasmic reticulum
golgi apparatus
lysosome
2
Gametes have
homologous chromosomes
twice the number of chromosomes
one allele for each gene
two sets of chromosomes
3
the three particles that make up atoms are
neutrons, isotopes, electrons
protons, neutrons, and electrons
protons, neutrons, and isotopes
positives, negatives, and neutrons
4
How many meters are in 2.4 km?
240
2,400
24,000
240,000
5
The lowest level of environmental complexity that includes living and nonliving factors is a
community
community
ecosystem
biome
6
The average conditions of the atmosphere in a particular area are referred to as the area's
weather
ecosystem
climate
latitude
7
Sea otters live in the ocean. Which is not likely a limiting factor?
competition
predation
drought
disease
8
Cross a Tt with a tt. The probability that offspring will be tall is
50%
25%
100%
75%
9
The movement of organisms into a range is called
emigration
carrying capacity
immigration
population shift
10
plants are
primary producers
omnivores
herbivores
primary consumers
11
Each of the following is a condition necessary for natural selection EXCEPT
fitness varies among individuals
more offspring are born than can survive
there is heritable variation among members of the population
population size is very large
12
What is formed at the end of meiosis?
four genetically different cells
four genetically identical cells
two genetically different cells
two genetically identical cells
13
a symbiotic relationship in which both species benefit is
parasitism
commensalism
mutualism
predation
14
The algae at the beginning of the food chain are
primary consumers
autotrophs
decomposers
heterotrophs
15
What organelle converts chemical energy stored in food into compounds the cell can use?
Centriole
Mitochondria
Rough ER
Chloroplast
16
During a controlled experiment, a scientist isolates and tests
a conclusion
a control group
a mass of information
a single variable
17
When during the cell cycle are chromosomes visible?
only when they are being replaced
only during cell division
only during interphase
only during G1 Phase
18
What is shown in the figure
Anaphase 1 of Meiosis
Independent Assortment
Replication
Crossing Over
19
only 10% of energy is passed to the next trophic level. Some is used in life processes and
stored as body tissue
eliminated as heat
stored as fat
reproduction
20
What goes in box 5 of this food web?
scavengers
carnivores
herbivores
decomposers
21
Gametes are produced by the process of
crossing over
mitosis
meiosis
replication
22
The pattern of spacing between individuals across the range of a population is its
growth rate
density
habitat
distribution
23
During Diffusion, the concentration of molecules is equal on both sides, the molecules will?
move to the outside of the cell
stop moving
continue to move across the membrane
move to the inside of the cell
24
Photosynthesis uses sunlight to convert water and carbon dioxide into
high-energy sugar and proteins
ATP and Oxygen
oxygen and carbon
oxygen and high-energy sugar
25
In what ways are herbivores and carnivores alike?
both use photosynthesis
both consume producers
both are autotrophs
both consume other organisms
26
a predator is an animal that
eats plants
lives on another animal without harming it
kills and eats other animals
lives inside another animal
27
Which structure makes proteins using coded instructions copied onto mRNA?
Golgi Apparatus
Ribosomes
Mitochondria
Vacuole
28
What happens during translation?
The cell uses a messenger RNA code to make proteins
messenger RNA is made from a DNA code
Copies of DNA molecules are made
Transfer RNA is made from a messenger RNA code
29
if the pH of stomach acid and of oven cleaner were measured
both would be below 7
both be above 7
stomach acid would be above 7, oven cleaner below 7
stomach acid below 7, oven cleaner above 7
30
What is the function of the nucleus?
builds proteins
stores sugars
packages proteins
stores DNA
31
you suggest that the presence of water could accelerate the growth of bread mold. This is
an analysis
an experiment
a conclusion
a hypothesis
32
A branch of biology that deals with interactions among organisms and their environment
recycling
modeling
economy
ecology
33
What if the population of the bird species in the ecosystem were to suddenly decrease?
the fish population would increase
the grass and fish would compete for resources
the fish would occupy the bird niche
the grass population would increase
34
What is the correct equation for cellular respiration?
Carbon Dioxide + Water -> Oxygen + Glucose + Energy
Carbon Dioxide + Water + Energy-> Oxygen + Glucose
Oxygen + Glucose -> Carbon Dioxide + Water + Energy
Oxygen + Glucose + Energy -> Carbon Dioxide + Water
35
Looking at a cell under the microscope, you note it is a prokaryote. How do you know?
it lacks a membrane
it lacks a nucleus
it lacks cytoplasm
it lacks genetic material
36
Which of the following happens when a cell divides?
It becomes more difficult to get oxygen and nutrients
Each daughter receives its own copy of the parent cells DNA
The cells volume increases
It becomes more difficult for the cell to get rid of waters
37
What is adding bases to the strand?
chromatin
nucleosomes
DNA polymerase
histones
38
Which of the following is NOT a basic method used y ecologists to study the living world?
modeling
animal training
observing
experiments
39
Based on the tables info, what percentage of guanine bases are in chicken DNA?
13.4%
28.8%
21.5%
19.9%
40
invasive species can threaten biodiversity by
deforstation
reducing fertile land
biological magnification
crowd out native species
41
What is the smallest living objects that biologists study?
cells
molecules
body organs
organisms
42
If a pea plants alleles for height are tt, what is true about the parents?
both parents were short
both parents contributed a recessive allele
both parents contributed a dominant allele
both parents were tall
43
What is this structure
a protein
a DNA molecule
a RNA molecule
an amino acid
44
Plants make their own food and are called
thykloids
pigments
autotrophs
heterotrophs
45
Which means of particle transport is shown?
protein pump
facilitated diffusion
exocytosis
endocytosis
46
The diffusion of water across a membrane is called
active transport
pinocytosis
osmotic pressure
osmosis
47
The work of scientists usually begins with
careful observation
creating experiments
testing hypothesis
drawing conclusions
48
The basic unit of length in the metric system is the
yard
gram
meter
liter
49
The different forms of a gene are called
traits
alleles
hybrids
pollinations
50
What is the primary function of the cell wall?
help the cell move
direct the activities of the cell
support and protect the cell
store DNA
51
Which best describes the organization of an ecosystem?
populations make up species, make up communities
species make up communities, make up populations
species make up populations, make up communities
communities make up species, make up populations
52
If an organisms diploid number is 12, its haploid number is
24
6
12
3
53
Organisms that have two identical alleles for a particular trait are said to be
homozygous
hybrid
heterozygous
dominant
54
What is produced during transcription?
RNA molecules
RNA polymerase
proteins
DNA molecules
55
Which is NOT a principle of the cell theory?
all living things are made of cells
very few cells are able to reproduce
all cells are produced from existing cells
cells are the basic units of life
56
Which of the following is a food chain in the food web shown?
grass, caterpillar, robin, hawk
tree, deer, mountain lion, fox
tree, rabbit, hawk
grass, grasshopper, snake, hawk
57
a symbiotic relationship in which on organism is harmed while the other benefits is
commensalism
parasitism
predation
mutualism
58
The graph shows bacterial growth. Which describes the growth curve?
demographic
exponential
limiting
logistic
59
Which means of particle transport is shown?
facilitated transport
diffusion
active transport
osmosis
60
According to Darwins theory of natural selection, individuals who survive are best adapted due
the possession od adaptations developed through use
lack of competition within the species
choices made by plant and animal breeders
possession of inherited adaptations that maximize fitness
61
This image illustrates which characteristics of living things
all things reproduce
living things need material and energy
living things grow and develop
living things are made of cells
62
Which amino acid is specified by the mRNA code CCC?
Pro
Lys
Gly
Ala
63
information gathered from observing a plant grow 3 cm over 2 weeks is called
variables
data
hypothesis
inferences
64
This example represents which big idea in biology?
evolution
interdependence in nature
growth, development, and reproduction
homeostasis
65
A cell membrane has channels/pumps move materials in/out of the cell. What are they made of?
proteins
carbohydrates
lipids
bilipids
