Unit 1: Ecosystems
What is a benefit of group hunting in lions?
It increases food availability for the group OR allows the division of labor of the pride
What human activity has the greatest impact on the carbon cycle?
Burning Fossil Fuels
Which is the correct order of living things from simplest to most complex?
Cell → Tissue → Organ → Organ System → organism
A. Introducing invasive species
B. Allowing pollution levels to rise
C. Replanting native vegetation
D. Hunting endangered animals
C
When you walk outside in the summer, your body starts to sweat. This is an example of ____ feedback.
negative
A population of wolves increases in a forest. What will most likely happen to the deer population they hunt?
It will decrease due to more predation
Explain how photosynthesis benefits both plants and animals in an ecosystem.
It produces food for plants and oxygen for animals.
Genes are segments of -
DNA that code for proteins
In a population of beetles, most individuals are green while few are brown. What does this distribution show?
Green color gives beetles a competitive advantage
Homologous structures (like arm bones) in different species indicate
Shared common ancestor
Explains why a drought affects the number of rabbits in a grassland.
The drought reduces the growth of plants the rabbits eat
What is the main function of cellular respiration?
To convert the stored energy in glucose into usable cellular energy (ATP)
What do the sequence of DNA bases determine?
The order of amino acids in a protein
A trait becomes more common in a population when it—
Helps individuals survive long enough to reproduce
A keystone species plays an important role because it—
maintains balance in the ecosystem
A graph shows the population of a species leveling off over time. What does this indicate?
The population has reached carrying capacity
What is the equation for photosynthesis?
6H20 + 6CO2 –Sunlight→ C6H12O6 + 6O2
In a population of rabbits, white fur is dominant to brown. If two heterozygous rabbits mate, what percent of offspring will likely be white?
75% white
Similar bone structures in the limbs of humans, whales, and bats indicate—
They share a common ancestor
Hunting in packs increases survival because
It requires less energy per individual OR Increases chances of acquiring food
What happens to an ecosystem when a keystone species is removed?
It usually experiences major population changes
Both photosynthesis and cellular respiration are part of a continuous energy cycle. What is the relationship between the two processes?
The products of one are the reactants of the other.
female has children with an unaffected male, and all of their sons are affected, but none of their daughters are. Name the most likely pattern of inheritance.
X-linked Recessive
Over many generations, dark-colored mice became dominant on lava rock fields because—
It allows them to camouflage themselves and allow them to survive and reproduce.
A drought causes the seeds on an island to become tougher and harder to crack. Which birds will have the highest chance of survival?
Birds with large, strong beaks