Topic 3
Why is asexual reproduction different from sexual reproduction?
The offspring of asexual reproduction is identical to the organism while the sexual reproduction shares half of the chromosomes of each parent.
What term describes a straight series of connections among organisms that feed on each other? What term describes the network of organisms that feed off one another?
Connections: food chain.
Network: food web.
In which type of interaction do both species benefit?
Mutualism.
Give an examle of a nonrenewable resource.
Natural gas
ANSWERS MAY VARY
What is this rate of change called?: Rathr than increasing at a constant rate, human population has increased more and more rapidly over time.
Expotential growth.
What are mating systems?
Behavior patterns that are related to how animals reproduce.
Name 2 abitotic and 2 biotic factors in the environment.
Abiotic: sand, rocks.
Biotic: cactus, snails.
ANSWERS MAY VARY.
To reduce competition, what is the role of an organism in its habitat?
Niche.
Fossil fuels are ____________ resources that are ________ distributed on Earth.
Nonrenewable, unevenly.
How do automobiles contribute to air pollution?
Increasing carbon dioxide.
What do ferns and cedar trees rely on to successfully fertilize themselves?
Wind.
What are mushrooms and bacteria?
What is the series of predictable changes that occur in a community over time?
Succession.
Name the 5 renewable energy sources.
Wind power, solar power, geothermal energy, hydroelectric power, and biomass.
What's a natural source of air pollution?
Volcanoes.
ANSWERS MAY VARY
What is not a stimulus that can trigger tropism in plants?
Temperature.
In one form of nitrogen fixation, the _________ energy of _________ splits nitrogen molecules into atoms.
Electrical, lightning.
Why is it in the best interest of a parasite not to kill its host?
The host is needed for the parasite to live, so if it dies, the parasite's life is now in danger.
What is the most abundant water resource on Earth?
Salt water.
What does a growing population do for the environment?
Since people need food, water, space, etc. to live, there would need to be more produced and this could become a problem.
How do environmental conditions affect the growth of an animal?
Animals need the proper amount of food to grow steadily. They also need enough space to live and develop.
What does an energy pyramid show?
The energy available beginning with the producers. The energy used by consumers in each level of the pyramid is only about 10% of the energy in the level below them.
Describe a predatory relationship in a forest ecosystem.
The predator might need to stalk its prey among dense stands of trees.
True or False: All minerals are ores, but not all ores are minerals.
False. All ores are minerals, but not all minerals are ores.
How does the change of flowing water (for ex. filling in a wetland for development) impact the environment?
It increases flooding and pollution.