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Science 9 Biology Review Flashcards | StudBud
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Science 9 Biology Review
Science 9 Biology Review
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1
When honey bees retrieve the nectar from flowers, they unknowingly pollinate those flowers. This is an example of...
mutualism
parasitism
commensalism
2
Which of the following scenarios exemplifies interspecific variation?
Angiosperms store their seeds in fruits
Male polar bears are twice the size of females
Some dog breeds have a much thicker coat than others
Geese migrate south in the winter, while owls are able to tolerate the cold
3
Binary fission, spores, and budding all utilize which of the following processes?
meiosis
artificial selection
natural selection
mitosis
4
Select the animal that does NOT utilize internal fertilization
Elephant
Eagle
Frog
Snake
5
Koalas live in forests in Australia. They only eat eucalyptus leaves, and reproduce one each year. Koalas are...
specialists, because they have a narrow niche
specialists, because they have a broad niche
generalists, because they have a broad niche
generalists, because they have a narrow niche
6
Ecosystems with a high diversity index...
are less adaptable to change
are more adaptable to change
receive very little sunlight and precipitation
receive lots of sunlight and precipitation
7
Which of the following characteristics is NOT part of an organism's niche?
Its method of reproduction
Its structural and behavioural adaptations
Its symbiotic relationships with other species
What type of habitat it lives in
8
In a DNA molecule, the nitrogenous base known as cytosine always binds with...
thymine
cytosine
guanine
adenine
9
A benefit of sexual reproduction is...
the ability to produce offspring that are genetically diverse
the ability to reproduce without the need for a mate
the ability to produce large quantities of offspring
10
Which of the following statements about artificial selection is correct?
It involves inserting a gene from one species into the DNA of another
It involves gradual changes that occur over millions of years
It selects for traits that humans find useful or desirable
It selects for traits that improve an organism's chance of survival
11
An individual with a recessive phenotype must possess...
Two recessive alleles
One dominant and one recessive allele
Two dominant alleles
12
Species that are "extirpated" no longer exist in the wild
True
False
13
Natural selection occurs because...
changes in the environment cause mutations to occur
variation occurs naturally within populations
organisms want to adapt to their environment
14
How have humans contributed to the current rate of extinction?
hunting
burning fossil fuels
habitat destruction
all of the above
15
Zoos help preserve biodiversity MAINLY by...
establishing breeding programs
setting aside pieces of land that cannot be developed by humans
educating the public about endangered species
protecting endangered species from poaching
16
A zygote is best defined as...
a sex cell (e.g. sperm or eggs)
a somatic cell
a newly fertilized egg
a type of sexual spore
17
Which of the following is classified as a continuous variation?
Ability to taste the "soapiness" in cilantro
Ability to roll your tongue
Ability to solve problems
Ability to see colour
18
Which of the following statements about meiosis is incorrect?
It is used to produce gametes
It requires a parent cell to divide twice
Daughter cells twice as much DNA as parent cells
It results in the production of four daughter cells
19
Indicator species are used to track environmental health because...
they are the most resiliant
they are at the top of the food chain
they are the most susceptible to habitat loss
they are at the bottom of the food chain
20
Each of the five previous major extinction events were caused mainly by...
meteors
Introduction of new species
human activity
Natural disasters & climate change
