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7th grade final
7th grade final
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Review of 7th grade Life Science (VA)
Flashcards
54 cards
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Practice quiz
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Host live
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Questions
54
Answers
1
What cell structure produces energy and is the powerhouse of the cell?
lysosome
vacuole
nucleus
mitochondria
2
Which scientist's theory of evolution is accepted in the scientific community today?
Schwann
Mendel
Watson
Darwin
3
The movement of molecules from an area of high concentration to low concentration is called...
diffusion
convection
active transport
osmosis
4
Robins feed on earthworms that need moist soil. If a drought occurred, the number of..
robins would likely decrease
earthworms would likely increase
earthworms would likely remain the same
robins would likely remain the same
5
Which list is in the correct order of classification from most general to most specific?
order, genus, family, species
order, family, genus, species
family, order, genus, species
species, genus, family, order
6
A trait that makes an organism well-suited to its environment and likely to survive is called
an adaptation
a mutation
descent & change
natural selection
7
The role of a species within a community is its ___
population
habitat
vocation
niche
8
Plant cells are different from animal cells because plant cells have
1 large vacuole, chloroplasts & mitochondria
many small vacuoles, chloroplasts, & cell wall
1 big vacuole, chloroplasts, & cell wall
many small vacuoles, cytoplasm, & chloroplasts
9
Many trees in rain forests have large, wide leaves that allows them to...
collect rainfall
provide shade for people
provide food for animals
collect the sun's energy
10
Why have snowshoe rabbits adapted with a fur color change from summer to winter?
the rabbit is less likely to have ticks and other parasites
the rabbit can stay warm in the winter months
the rabbit is always camouflaged from predators
the rabbit has more body fat to survive in the winter
11
G = green eyes, dominant; g = non-green eyes, recessive. What is probability kids have green?
100%
50%
0%
25%
12
Which is NOT a description of a DNA molecule?
twisted ladder
straight ladder
double helix
spiral staircase
13
Which cell structure controls all cell activities?
ER
mitochondria
nucleus
ribosome
14
A Punnett square does NOT show
the parents' genotypes
all possible results of a cross
possible genotypes of offspring
the actual results of a cross
15
Most of the ecological problems on Earth today have been caused by...
biological diversity
volcanic activity
human activities
earthquakes & hurricanes
16
The group which remains under normal conditions instead of experimental conditions is the __
control group
variable group
experimental group
normal group
17
Which of these questions is testable by an experimental investigation?
What is the group's favorite movie?
How do robots work?
Where do koala bears naturally live?
Which type of battery lasts the longest?
18
Which of the following is NOT part of cell theory?
all living things are made of cells
cells are the basic unit of all living things
all cells have a cell wall
all cells come from other cells
19
The first organism in a food chain is always...
a consumer
an herbivore
a producer
a carnivore
20
Why are the words "light energy" written above the arrow in the photosynthesis equation?
light energy is produced during the reaction
light energy is necessary for the reaction to occur
sugar can only be produced in the presence of life
oxygen can only be produced in the presence of light
21
The naming system invented by Carolus Linnaeus is known as...
binomial nomenclature
two-word naming system
speciation nomenclature
genus species system
22
After mitosis takes place, the daughter cells have ___ number of chromosomes as the parent cell
half the
double the
ten times the
the same
23
Which is in order from most general to most specific?
domain, class, phylum, kingdom
kingdom, domain, class, phylum
class, phylum, kingdom, domain
domain, kingdom, phylum, class
24
A change in genetic code is called...
a recessive trait
a dominant trait
an adapation
a mutation
25
Humans have 46 chromosomes in somatic cells. How many chromosomes in human egg & sperm?
46 in egg, 23 in sperm
46 in egg, 46 in sperm
23 in egg, 23 in sperm
24 in egg, 24 in sperm
26
4 mice, same amount but different types of food, 2 weeks. Their mass was taken. IV?
total mass gained
health of mouse
food preference of mice
types of food
27
Scientists think related species have similar body structures because related species inherit
many of the same genes from only two parents
all the same genes from a common ancestor
all the same mutations from a common ancestor
many of the same genes from a common ancestor
28
If you were testing batteries to see which lasted the longest, the independent variable is
flashlight used to test batteries
brands of batteries
how long batteries lasted
light bulbs
29
Which life process is essential for an entire species to survive over time?
growth
reproduction
respiration
digestion
30
A pond that suddenly has an increased growth in algae probably was polluted by...
an increase in chromosomes
people dumping waste oil in the pond
a diseased animal
people over-fertilizing their lawns nearby
31
Want to find out if hummingbirds prefer a certain shape of flower for food. You should...
put some feeders on trees and some on poles
use different sugar for each flower type
use feeders designed to look like different flowers
put each feeder in the afternoon sun
32
Egg and sperm are types of sex cells sometimes called
somatic cells
embryos
gametes
fetuses
33
Biomes are best described as large geographic areas with similar...
rainfall, soil, grass
plants, water supply, altitude
climates, plants, animals
humidity, animals, nutrients
34
Which list contains only abiotic factors in an ecosystem?
water, soil, grass, bacteria
temperature, soil, algae, water
plants, insects, animals, fungus
water, soil, temperature, light
35
What is the correct order from least complex to most complex?
cell, organism, organ system, organ tissue
tissue, cell, organ, organ system, organism
cell, tissue, organ, organ system, organism
organ, organism, organ system, tissue, cell
36
If a horse and donkey mate and produce a mule, why can't the mule reproduce?
horses and donkeys are from different phyla
mules are better adapted for survival
mules are always male
horses and donkey are not the same species
37
The purpose of meiosis to allow ___ to take place.
growth
replacement
reproduction
development
38
The energy to perform life functions is made available during the process of...
respiration
circulation
excretion
absorption
39
Why is it possible for the number of kingdoms to change?
changes happen as we learn more about living things
there are more languages today than when system was made
scientists in different countries don't agree on the system
many traits have disappeared from species
40
___ is a struggle between organisms for limited resources & determines size of population
cooperation
mimicry
competition
adaptation
41
The cell structures that trap the sun's energy are...
chloroplasts
ribosomes
nucleus
cell walls
42
The simple sugar produced during photosynthesis is
sucrose
fructose
chlorophyll
glucose
43
In photosynthesis, light energy is changed to...
carbon dioxide
chemical energy
kinetic energy
mechanical energy
44
More resources can be made available to humans if we practice...
conservation
competition
greenhouse effect
human adaptation
45
Results that occur during an experiment are compared to a
control group
conclusion
hypothesis
data table
46
The gradual change in the genetic makeup of an entire species over a long time is known as...
natural selection
adaptation
evolution
mutation
47
The type of soil in an ecosystem determines the...
amount of precipitation
climate
types of plants
temperature
48
Where does photosynthesis take place?
chloroplast
ribosome
mitochondria
nucleus
49
How many independent variables should be in an experiment?
two
three
one
as many as you want
50
When an entire forest is cut down, the soil will most likely ...
experience erosion
improve
remain the same
form layers
51
What is the correct order of phases in the cell cycle?
cytokinesis, mitosis, interphase
mitosis, interphase, cytokinesis
interphase, mitosis, cytokinesis
interphase, cytokinesis, mitosis
52
The kind of biome that develops in an area is mainly determined by temperature and ...
air pressure
precipitation
type of soil
average wind speed
53
Which scientific name is written correctly?
Felis Onca
FELIS ONCA
Felis onca
felis onca
54
Genes that mask or cover up other genes are said to be..
recessive
phenotype
dominant
hybrid
