May 2021 Question Preview (ID: 19463)
Science Topics From The 1st And 2nd Semester.
TEACHERS: click here for quick copy question ID numbers.
When farmers grow crops, they breed the best fruit or vegetable plants together. This is called
a) decomposition
b) natural selection
c) a behavioral modification
d) selective breeding
Change in populations (such as galapagos island tortoises) over many generations is a result of
a) natural selection
b) asexual reproduction
c) overproduction
d) migration
At each stage of ecological succession, modifications make it suitable for the next stage as
a) biodiversity and stability increase
b) climates become warmer
c) less and less food is available
d) biodiversity and stability decrease
When rabbits mate, sperm fertilizes an egg and
a) asexual reproduction occurs
b) genetic material is passed from generation to generation
c) all offspring are identical clones of one parent
d) the species becomes extinct
All ecosystems must have plants. Plants change light energy to chemical energy while making plant food. Energy flows through an ecosystem in this order:
a) sun, plants, thing that eats plants, meat eater
b) meat eater, thing that east plants, sun, plants
c) thing that eats plants, sun, meat eater, sun
d) sun, plants, meat eater, thing that eats plants
Making plant food from sunlight is
a) a watershed
b) the response of the nervous system
c) the structure of chlorophyll
d) the function of a chloroplasts
Camouflaged fur is an example of
a) maintaining homeostasis
b) radiant energy transforming into chemical energy
c) selective breeding
d) an adaptation that aids survival
Your respiratory system (lungs) exchange oxygen and carbon dioxide. But the system that transports nutrients and wastes is
a) circulatory system
b) nervous system
c) endocrine system
d) reproductive system
The function of a cell's vacuole is
a) sexual reproduction
b) storage
c) gas exchange
d) respiration
The mitochondria of a cell
a) lives forever
b) produces energy from food
c) mutate suntil superpowers are achieved
d) photosynthesizes
Genes are found on chromosomes in the nucleus of cells. Genes determine
a) traits
b) skills
c) intelligence
d) all of these answers are correct
An automatic response to stimuli (dropping a hot potato) is a result of the
a) nervous system
b) circulatory system
c) muscular system
d) integumentary system
Breathing (using oxygen to burn calories from food, resulting in carbon dioxide) and photosynthesis are
a) dominant traits
b) response to external stimuli
c) physical changes
d) chemical changes
Photosynthesis turns
a) radiant energy into chemical energy
b) chemical energy into electrical energy
c) solar energy into thermal energy
d) kinetic energy into potential energy
Which would an ecosystem rely on the most?
a) butterflies and grasshoppers
b) panda bears and mice
c) trees and grass
d) hawks and turtles
Organs of the excretory system such as the kidneys, liver, lungs and large intestine
a) remove toxins from the body
b) produce caron dioxide
c) determine traits
d) turn radiant energy into chemical energy
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