WEEK 6-8: BIOTIC AND ABIOTIC FACTORS

WEEK 6-8: BIOTIC AND ABIOTIC FACTORS

AFTER THIS LESSON, YOU WILL BE ABLE TO:

• Differentiate biotic from abiotic components of an ecosystem.

• Describe the different ecological relationships found in an ecosystem.

• Predict the effect of changes in one population on other populations in the ecosystems.

• Predict the effect of changes in abiotic factors on the ecosystem.

CAN YOU STILL RECALL ALL THE LESSONS FROM WEEK 1 TO 5?

Review your notes before heading to the next slide. The next 10 slides are questions from week 1 to 5.

Multiple Choice

Which parts are the magnifying parts of the microscope?

• Arm and Base

• Inclination joint and Pillar

• Eyepiece and Objective Lens

• Mirror and Diaphragm

Multiple Choice

Which part of the microscope will you move to gather and direct light?

• Diaphragm

• Mirror

• Objective Lens

• Eyepiece

Multiple Choice

Which of the following knob will you turn to move the objective lens up and down?

• Coarse Adjustment Knob

• Fine Adjustment Knob

• Condenser Adjustment Knob

Multiple Choice

Which of the following knob will you turn for sharp focusing?

• Coarse Adjustment Knob

• Fine Adjustment Knob

• Condenser Adjustment Knob

Multiple Choice

A group of red ants inhabits a mound in your yard. Which level of biological organization does is being described?

• Population

• Community

• Ecosystem

• Biome

Multiple Choice

Which of the following statement describes an organ system?

• A group of similar cells working together to perform a certain function.

• Different tissues organized together to perform a certain function.

• Collection of organelles functioning together

• Consists of several different organs working together to perform several functions.

Multiple Choice

Which of the following organelles is NOT present in animal cell?

• Chloroplasts

• Ribosome

• Nucleus

• Mitochondria

Multiple Choice

In which organelle is the bundle of DNA called chromosomes located?

• Mitochondria

• Ribosome

• Nucleus

Multiple Choice

Which type of fertilization do frog gametes undergo?

• Internal Fertilization

• External Fertilization

Multiple Choice

One disadvantage of _________________ is that the offspring inherits all the traits of its parent so that a weak parent produces a weak offspring.

• Sexual reproduction

• Asexual Reproduction

DEFINITION OF TERMS:

• ECOSYSTEM (noun)- The living things, the physical environment and the interactions among them.

• PHOTOSYNTHESIS (noun)- The process of making food in plants by absorbing sunlight and water.

• POPULATION (noun)- is a group of organisms, of the same species, which interbreed and live in the same area at the same time.

• HABITAT (noun)-  place when organism lives 

• NICHE (noun)-  all interactions of an organism with the biotic and abiotic parts of its habitat. 

3 COMPONENTS OF ECOSYSTEM

(Within a natural system, the transfer of energy causes the cycling of matter.)

• AUTOTROPHS or PRODUCERS

• HETEROTROPHS or CONSUMERS

• ABIOTIC MATTER

BIOTIC VS ABIOTIC FACTORS

• Biotic factors include all the living components of the ecosystem e.g. plants, animals etc.

• Abiotic Factors include all the nonliving components of the ecosystem e.g. water, sunlight, wind

• 
  

CHARACTERISTICS OF A LIVING THING

• How do we know if it is a living thing?

• Click the play button.

AUTOTROPHS or PRODUCERS VS. HETEROTROPHS OR CONSUMERS

• Autotrophs and Heterotrophs makes up the BIOTIC COMPONENTS of the ecosystem.

• 
  

• 
  

ABIOTIC FACTORS

The abiotic factors are grouped into 3 types

• CLIMATIC FACTORS pertains to the factors in the environment that affect the weather (e.g. light, temperature, water and wind)

• EDAPHIC factors pertain to the structure and composition of SOIL, as well as its physical and chemical properties (e.g. Soil texture, Soil pH and Humus Conteent)

• PHYSIOGRAPHIC FACTORS pertain to the physical nature of land or its topography and location.

ABIOTIC FACTORS

• Click the play button of the video on the right and write down all important details.

• 
  

• 
  

BIOTIC FACTORS

• Click the play button of the video on the right and write down all important details.

Multiple Choice

Is pH a biotic or abiotic factor?

• biotic

• abiotic

Multiple Choice

Is the SUN  biotic or abiotic 

• Abiotic 
• Biotic 

Multiple Choice

All the living things in an ecosystem are called ______________________ factors.

• Ecosystem

• Environment

• Biotic

• Abiotic

Multiple Choice

All the living things in an ecosystem are called ______________________ factors.

• Ecosystem

• Environment

• Biotic

• Abiotic

Multiple Choice

In which category does a grass belong?

• Autotroph

• Heterotroph

ECOLOGICAL RELATIONSHIPS AND INTERACTIONS

• Competition increases when resources like food, habitat and water are in short supply. Some species have adaptations that reduce competition within a population. 

PREDATION

SYMBIOSIS

 Symbiosis means living together. Three kinds of symbioses are recognized: mutualism, commensalism, and parasitism.

FOOD CHAIN and FOOD WEB

Click the plau button and write down important details.

HIERARCHY OF CONSUMERS

Multiple Choice

A relationship that describe a close interaction between two different species is known as what?

• Biodiversity
• Symbiosis
• Predation
• Emigration

Multiple Choice

Termite colonies have workers, soldiers, and kings and queens that each have different jobs. What is the ecological relationship?

• Cooperation
• Parasitism
• Commensalism
• Competition

Multiple Choice

What is the ecological relationship shown in this image of a robberfly and beetle?

• Cooperation
• Parasitism
• Predator-prey
• Competition

Multiple Choice

Barnacles sometimes live on the outside surface of other larger shelled organisms without causing any harm. What is the ecological relationship?

• Mutualism

• Parasitism

• Commensalism

• Predator-Prey

Multiple Choice

Barnacles sometimes live on the outside surface of other larger shelled organisms without causing any harm. What is the ecological relationship?

• Mutualism

• Parasitism

• Commensalism

• Predator-Prey

Multiple Choice

An organism that needs to use chemicals to make its own food is known as a(n):

• Heterotroph
• Autotroph
• Decomposer
• Consumer

Multiple Choice

This is known as a relationship in which both organisms involved benefit. 

• Predator-Prey
• Commensalism
• Mutualism
• Decomposition

Multiple Choice

A mosquito feeds off of the blood of different organisms. This usually causes discomfort to the organism and sometimes disease and death. This is an example of:

• Parasitism
• Decomposition
• Commensalism
• Mutualism

Multiple Choice

An animal that hunts and consumes other organisms is known as a:

• Prey

• Decomposer

• Predator

• Commensalist

Multiple Choice

An animal that hunts and consumes other organisms is known as a:

• Prey

• Decomposer

• Predator

• Commensalist