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WorksheetsBiodiversity
Total questions: 25
Worksheet time: 18mins
Which of the following situations contributes to stability in an ecosystem?
increase in biodiversity
decrease in biodiversity
extinction of a population from the ecosystem
removal of many populations of organisms
What are three things that create biodiversity?
species, genetic variation, and ecosystem
mutation, disorder, regression
genes, cells, traits
water, land, mountains
Which structural adaptation allows the plant to complete photosynthesis?
vacuole
chloroplast
bulb
roots
The lysosomes of a cell help to break down larger food molecules into smaller molecules. What organ system functions in this manner?
Digestive system
Nervous system
Lymphatic system
Integumentary system
Xylem is a plant tissue made up of long cells stacked end to end through the length of the plant’s stem. Which function is xylem specifically adapted to perform in plants?
help prevent water loss
exchange gases with the atmosphere
capture sunlight for photosynthesis
transport water from roots to leaves
The climate of an area changes. How can a species that lives in the area avoid extinction?
The species could stay in the area until the climate changes again.
The species could move to an area with a warmer climate.
The species could evolve traits that help it to adapt to the new climate.
The species could hibernate for several years.
What is the main feature of birds that allows them to be light enough for flight?
fast-beating heart
strong muscles
hollow bones
complex lungs
Leopard seals are animals adapted to survive in the freezing conditions of Antarctica. Individual leopard seals vary in their different traits. Which of the following variations would give a leopard seal the greatest chance of surviving in its harsh environment?
a spotted coat
short fur
long legs
abundant whiskers
Green plants use energy from the sun to change carbon dioxide and water into food and oxygen. What clue tells you that this process is a chemical change?
all the matter stays the same
the suns energy is used for the process
the matter changes to different forms
the color of the plants is always the same
Physical properties of a substance are a characteristic that can be measured or noticed by your senses. Color, size, odor, and density are examples of physical properties. Chemical properties describe sometimes invisible changes when two or more substances react to form another substance. Which of the following describes a chemical property of matter?
it is a liquid at room temperature
it expands when it freezes
it can rust
it has a boiling point of 100
During digestion, which of the following energy conversion occurs?
chemical energy, heat energy
electrical energy, chemical energy
mechanical energy, heat energy
heat energy, chemical energy
Thermal energy is one of the forms of energy resulting from digestion which gets energy from food in the form of…
mechanical energy
radiant energy
light energy
chemical energy
Which two organelles work together to remove waste from the body like the excretory system?
nucleus and cell membrane
vacuole and cell membrane
chloroplast and mitochondria
vacuole and mitochondria
The lysosomes of a cell help to break down larger food molecules into smaller molecules. What organ system functions in this manner?
digestive system
nervous system
lymphatic system
integumentary system
The diagram below shows some structures of the human excretory (urinary) system. Which of the structures filter wastes from the blood and regulates the amount of water in the body to maintain balance?
R
S
T
W
A student drew the picture of a human body system shown below. The student labeled some of the organs of the system. The main function of this system is to
sense odors in the environment
chew food as it enters the mouth
exchanges gases with the environment
transport nutrients throughout the body
A few years ago the population of male blue moon butterflies on the island of Samoa declined. One hypothesis for the decline of the male butterflies is that a disease infected the cells of female butterflies. The disease was passed to offspring through the females’ eggs and killed the male butterfly embryos. At one point during the decline, nearly all the butterflies in the population were females, but after five years the number of males in the population increased significantly.
Male butterflies in the population that survived were able to kill the disease living in the females’ egg cells.
Female butterflies in the population that survived had a genetic adaptation that allowed them to transform into male butterflies.
Male butterflies in the population that survived had a gene that made them resistant to the disease, and they passed the gene on to their offspring.
Female butterflies in the population that survived were able to protect the male eggs from the disease and provide extra care for the male offspring.
The species of birds are very similar, but the Hood mockingbird has a longer beak than the other three species. Which of the following best explains this difference?
The Hood mockingbird needs a longer beak for defense against predators.
The Hood mocking originated from a different type of bird than the other species.
The Hood mockingbird’s longer beak is an adaptation to the food available in the bird’s habitat.
The Hood mockingbird’s beak stretched to reach its food, and the longer beak was passed down to its offspring.
Based on the graph, if the environment was to change dramatically, or a new plant disease were to break out, which plant type would most likely survive?
wild wheat
domestic wheat
wild corn
domestic corn
1. The ecosystem with the greatest sustainability will be the one that has the –
greatest variety of different organisms
highest annual precipitation
lowest population of harmful insects
fastest growing season of green plants
The ocean ecosystem has a high sustainability because of
strong, persistent currents
predator/prey relationships
green plants growing on the bottom
the large variety of different organisms
Why does biodiversity contribute to a habitat’s sustainability?
The more plants and animals in a habitat, the greater the biomass, which is how habitats store energy.
The greater the number of species, the more competition there is for food between predators, which sustains their populations.
Changing conditions that harm one species leave other species to survive and perhaps even thrive.
Landforms change shape less frequently when there is a greater number of species using the land.
Which of the following most likely supports the most sustainable ecosystem?
The habitat with the greater number of green plants
The habitat with the greatest variety of living things
The habitat with the warmest average temperature
The habitat with the greatest number of consumers
What genetic trait did the successful finches from the Galapagos Islands pass on to their offspring?
bigger brains
smaller feet
different beak size
Natural Selection is
the process where all living things survive
the process of gradual change over time
why all living things die
