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WorksheetsFall Semester Exam Biology 2020-2021
Total questions: 32
Worksheet time: 16mins
The rising temperatures of ocean waters have caused fish to...
spread out and swim in new territories
mutate into new species of fish
rise in the food chain to become top predators
adapt to the colder temperatures
Intestinal bacteria and humans have a symbiotic relationship. The bacteria get nutrients and shelter from the humans and produce vitamin K that the humans can use. Which type of symbiotic relationship is this?
Mutualism
Commensalism
Parasitism
Competition
When a yard is mowed, species such as flowers and young trees and bushes are cut down and destroyed, only leaving the grass behind. What effect does this have on the biodiversity of the yard?
it decreases species diversity
it increases species diversity
it has no effect on species diversity
The Indian Leaf Butterfly looks like a leaf. How is this a beneficial adaptation?
camouflage helps to hide from predators
leaves look like food to most predators
the appearance of a leaf is designed to scare away predators
looking like a leaf is not beneficial
The Monarch Butterfly has very bright colors that indicate to other organisms that it might be be poisonous or taste bad. What kind of adaptation is the bright colors of a Monarch?
structural
behavioral
camouflage
poisonous
If two different species of organisms ate the same things, but foraged for food in different places, what can you conclude about their relationship?
competition is reduced
they are mutualistic
they are predators of each other
competition is increased
What is placed at the top of an energy pyramid?
the highest level consumer
the lowest level consumer
the producers
intermediate level consumers
Generally, if you remove an organism from an ecosystem, what happens to the stability of that ecosystem?
stability decreases
stability increases
stability does not change
Many invasive species spread quickly through an ecosystem, crowding out many other important species. What generally happens to an ecosystem that encounters a dominant invasive species?
the biodiversity decreases
the biodiversity increases
the invasive species is a sign of the ecosystem's health
the invasive species interbreeds with native species
An ecosystem that consists of barren rock with a few lichen patches is most likely going through what?
primary succession
secondary succession
a natural disaster
a climax community
Why is taxonomy important?
to standardize the naming and organization of organisms
to keep the classification system from being altered
to prevent name changes of extinct organisms
to allow the max number of organisms per level
When populations of a species are isolated, and a member of one population integrates into a different population, what has occurred?
gene flow
genetic drift
natural selection
taxonomy
All of the following are characteristics that plants and fungi have in common, except...
organisms are photosynthetic
alternation of generations is possible
mostly non-motile
are eukaryotic
Why are hybrid species often stronger than either of their parent species?
favorable genes from each parent organism help the hybrid to survive
hybridization allows for survival in extreme environments
inherited traits make the hybrid species more susceptible to disease
hybridization reduces genetic diversity
Gene flow increases...
genetic variety
genetic diversity
variety in the population's gene pool
all of these; they mean the same thing
Which of the following is true about natural selection?
genetic traits are not passed down to offspring
variation in a population does not exist
populations change over time to better fit their environment
no more offspring are born than can survive
What are homologous structures?
bone structures that are similar between organisms
limb functions that are similar between organisms
similar biogeography between organisms
comparative nitrogenous bases between organisms
Photosynthesis uses carbon dioxide and water to create food for the plant. What organelle is responsible for this chemical process in the plant cells?
chloroplast
cytoplasm
mitochondria
nucleus
What is the function of guard cells on the underside of a leaf?
they control the opening and closing of stomata
they synthesize proteins
they transport water and minerals
they allow light to enter the cell
Which of the following best describes enzymes?
enzymes function best under specific conditions
enzymes work equally well under all conditions
enzymes' activity rates increase until they become inactive
enzymes do not function in temperatures higher than 100 degrees celsius
What is the role of root hairs on the roots of plants?
root hairs increase root surface area which helps take up more water
root hairs convert minerals into glucose
root hairs decrease the need for osmosis and diffusion
root hairs prevent water loss in leaves
What are the four most abundant elements in the biomolecules?
carbon, hydrogen, oxygen, and nitrogen
hydrogen, nitrogen, oxygen, and phosphorus
carbon, fluorine, oxygen, and phosphorus
carbon, hydrogen, iodine, and oxygen
Unlike eukaryotic cells, prokaryotes do not have...
a nucleus
a cell wall
ribosomes
DNA
What would happen to a process that involves active transport if there was no ATP available?
the process would stop
the process would reverse
the process would slow down
the process would happen through the phospholipids instead of the protein
You have a dialysis tube filled with salt water and you place it into a beaker of pure water. What will happen?
water will enter the tubing
water will leave the tubing
salt will leave the tubing
water will enter and leave the tubing at the same rate
What is the name of the theory that states complex cells evolved after primitive cells engulfed bacterial cells that continued functioning?
the endosymbiotic theory
the big bang theory
the evolutionary theory
the selective theory
In what part of the cell cycle is DNA replicated?
s phase
g1 phase
g2 phase
mitosis
How does phototropism work?
light stimulates a hormone in the shoot system of the plant
water evaporates faster from one side of the plant
the xylem absorbs more nutrients
the light side of the stem absorbs more carbon dioxide
In binomial nomenclature, the scientific name is made of the genus and ....
species
family
kingdom
order
Some humans have traits that protect them from contracting malaria. Which of the following is responsible for an organism's traits?
their genetic composition
vaccines
medications
their behavior in avoiding the affected individuals
If a question talks about the many physiological similarities between two species, the question might be suggesting that the two species have...
a common ancestor
similar environments
similar mating rituals
similar diets
If two species cannot interbreed (cannot make babies together) what evolutionary process cannot happen between them?
genetic drift
gene flow
mutations
natural selection
