ENVIRONMENTAL SCIENCE A - UNIT 3: BIONOMICS EXAM

PDF Download

ENVIRONMENTAL SCIENCE A - UNIT 3: BIONOMICS EXAM

QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -63 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: what would happen to the populations of snakes and owls if there was a drought and less grass was available?

Answer:

the population would decrease.

Question 2: what is photosynthesis? select all that apply.

Answer:

a type of carbon fixation in which inorganic carbon is turned into a usable form for organisms the process in which the energy from sunlight is used to make sugars out of carbon dioxide from the atmosphere and water Question 3: corals can become bleached, meaning that the plankton living within them die.what happens to a population of fish that feed on plankton within the reef?

Answer:

the fish population decreases due to the decrease in plankton.

Question 4: on the african savanna, grasses feed wildebeest, gazelles, and hares. lions, hyenas, and cheetahs hunt the wildebeest and gazelles. vultures eat the remains from predator kills.bacteria and fungi break down anything that is left over from the carcasses. dung beetles eat the feces left behind from grass-eating animals like hares and elephants.which organisms are herbivores? select all that apply.

Answer:

hare gazelle wildebeest

Question 5: what is carbon fixation?

Answer:

the conversion of inorganic carbon into organic compounds that are usable by organisms.Question 6: in the dry desert, green, leafy plants are scarce. tough cacti are more common.small animals like rats, mice, and insects rely on the cacti for food. larger animals like lizards eat those small animals and insects. hawks and snakes prey on the small and large animals.atch each consumer from the example with the correct trophic level.

Answer:

primary consumer : insect

secondary consumer : lizard

tertiary consumer : hawk

Question 7: what does "aquatic" mean?

Answer:

animals and plants that live in or around water

Question 8: what is an omnivore?

Answer:

an animal that eats both plants and animals

Question 9: how does feedback control a system?

Answer:

positive feedback amplifies a previous change that negative feedback corrects.

Question 10: what are abiotic factors of biomes? select all that apply.

Answer:

rainfall minerals

Question 11: match each abiotic or biotic component with its correct ecosystem.

Answer:

cold water, lots of oxygen, intermediate sunlight : lake abiotic components

freshwater jellyfish, steelhead trout, bladderwort : lake biotic components

jaguar, anaconda, orchid plants : amazon rainforest biotic components

heavy rainfall, nutrient-dense soil, warm air : amazon rainforest abiotic components

puffer fish, shrimp, seagrass : coral reef biotic components

warm water, cool moist air, oxygen : coral reef abiotic components

Question 12: what part of a biome is abiotic?

Answer:

the nonliving components

Question 13: which statement is true of succession?

Answer:

succession happens all the time, and sometimes we can see it.Question 14: in order for an ecosystem to be diverse, it must be healthy. in order for an ecosystem to be healthy, it must have enough food, energy, and nutrients for the organisms that are present. what trophic levels are an absolute necessity in ensuring that an ecosystem is diverse and healthy? select all that apply.

Answer:

producer decomposer

Question 15: why are producers important to ecosystems? select all that apply.

Answer:

they are able to make their own food.they are the primary source of food for other organisms.they convert the sun's energy into a usable form for other organisms.

Question 16: what happens to the energy as it flows between trophic levels?

Answer:

it flows in one direction and most of the energy doesn't make it from one level to the next level.

Question 17: what does the term "stable states" refer to?

Answer:

a theory that ecosystems are stable but can transition easily to another state from small disturbances or changes

Question 18: lesson 12

Answer:

trophic levels

Question 19: which describes ecological pyramids?

Answer:

ecological pyramids show hierarchical layers of organisms in an ecosystem. producers, the organisms with the most energy, are at the bottom of the pyramid, followed by several layers of consumers.

Question 20: what is a terrestrial ecosystem?

Answer:

a land-based community of organisms

Question 21: what is a habitat?

Answer:

a habitat is any natural home or environment for an organism.

Question 22: match each symbiotic relationship with the correct example.

Answer:

commensalism : as cows graze, they stir up insects in the grass. cattle egrets follow behind the livestock, eating the insects. the cows are not affected by the egrets.mutualism : the yucca moth pollinates the yucca plant and lays her eggs in the seed pods parasitism : when mosquitoes bite, the feed off the blood of their host. they can also inject diseases like malaria and zika virus