BISC 100 Study Guide - Midterm Guide: Keystone Species, Intraspecific Competition, Logistic Function

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ultramarineeagle499

16 Mar 2020

School

Simon Fraser University

Department

Biological Sciences

Course

BISC 100

Professor

Leah Bendell- Young

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Document Summary

Ecology is the scientific study of the interactions between organisms and their environments. Biotic factors are all of the organisms in the area and the living component of the environment. Abiotic factors are the environment"s nonliving component and include chemical and physical factors, such as temperature, light, water, minerals, and air. An organism"s habitat is the specific environment it lives in and includes the biotic and abiotic factors of its surroundings. A population is a group of individuals of a single species that occupy the same general area at the same time. Limiting factors are environmental factors that restrict population growth and ultimately control the number of individuals that can occupy a habitat. An assemblage of species living close enough together for potential interaction is called a community . Interspecific interactions are classified according to the net effect on the individuals concerned. Trophic structure refers to the feeding relationships among the various species in a community.

Related Questions

Shawnta used several terms in her post that I want to be sure everyone understands. Ecology is studied with a hierarchy, similar to the hierarchy of classification. The lowest level is the individual. A group of individuals of the same species that live in the same area is called a population. All of the different populations that live in the same area make up a community. So far we have only been talking about the living organisms. When you add in the non-living components of an area you have an ecosystem. The living parts of an ecosystem are called the biotic components and the non-living parts are called the abiotic components.
What are some of the abiotic components that affect what can live in an ecosystem?

mauvewhale457

Question 1

Which is a population?

		All the members of a species inhabiting a given location.
		All the interacting populations in a given area.
		The living community and the physical environment functioning together as an independant and relatively stable system.
		All of the above

5 points

Question 2

Which is not an abiotic factor?

		Intensity of light
		type of substratum
		range of temperatures
		living things

5 points

Question 3

What does the fertility rate have to be in order to keep a population stable (neither increasing or decreasing)?

		1
		2
		3
		4

5 points

Question 4

Japan's population is falling due to a low fertility rate.

True

False

5 points

Question 5

When the population remains relatively constant over a number of years this is known as

		steady state
		abiotic state
		biotic state
		Both abiotic and biotic states

5 points

Question 6

Which are the living components of the environment?

		biotic factors
		abiotic factors
		neutrality factors
		non-organic factors

5 points

Question 7

What is carrying capacity?

		The maximum number of organisms the resources of an area can support.
		The amount of abiotic factors in an area.
		The amount of energy.
		The density of a star.

5 points

Question 8

Which can synthesize their own food?

		heterotroph
		herbivore
		autotroph
		carnivore

5 points

Question 9

Which is an example of a saprophyte?

		vulture
		bacteria
		mouse
		frog

5 points

Question 10

This consumes both plants and animals.

		Carnivore
		Herbivore
		Omnivore
		Tachivore

5 points

Question 11

Global warming might actually cause global freezing.

True

False

5 points

Question 12

There are good odds that a future virus can cause the extinction of the human race.

True

False

5 points

Question 13

A heterotroph can make its own food.

True

False

5 points

Question 14

According to the 1st Law of Thermodynamics, disorder always increases.

True

False

5 points

Question 15

In 5 billion years the Sun will expand and burn up the Earth.

True

False

5 points

Question 16

Einstein stated that World War 4 will be fought with sticks and stones.

True

False

5 points

Question 17

Which is not true of the First Law of Thermodynamics?

		Energy cannot be created
		Energy cannot be destroyed.
		Energy can change forms.
		All are true.

5 points

Question 18

According to the Second Law of Thermodynamics, the heat death of the universe is its ultimate fate.

True

False

5 points

Question 19

Which is organic?

		CH₄
		CO₂
		H₂O
		N₂

5 points

Question 20

The Sun and the core are the primary energy sources for the Earth.

True

False

limejackal967

Question 13

Species that are purposely or accidentally introduced to a new geographical region

Answers:	frequently form hybrids with native species
	die out quickly
	can become serious pests by killing the native species
	experience increased mutation rates that help them adapt to the new ecosystem

______________

Match the following terms with correct definition.

Question
biome
population
ecosystem
community

All Answer Choices
A. all of the individuals of a species in a specific area
B. comprises all of the biotic and abiotic factors in a particular area
C. interacting species occupying a given habitat
D. large scale interactions of species defined on land by the type primary type of vegetation

_______________

Question 24

Which of the following is an example of a species distributed in a random distribution?

Answers:

oak trees that drop their seeds to the ground

a herd of elephants traveling to the watering hole

dandelion seeds that are blowing in the wind

nesting penguins

________________

Question 33

________

Which of the following is a threat to biodiversity?

Answers:

habitat loss

overharvesting

climate change

all of the above

_____________

Some theories around why more diversity in species or areas known as [a___________] are found near the [b_______] are: more energy or greater [c_____] of the ecosystems, giving the opportunity for more [d________].

Answers:

age

speciation

equator

size

hotspots

evolution

BISC 100 Study Guide - Midterm Guide: Keystone Species, Intraspecific Competition, Logistic Function

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