AIM: How do organisms maintain dynamic equilibrium that sustains life?

4/19/13DO NOW:1. Pick up today’s quiz &

finish it

HOMEWORK:1. Study for Monday’s Preliminary ILS Exam #1

Identify the structure & function of the labeled parts of the plant below.

A – Flower – Reproduction in the plant

B – Leaves – Site of photosynthesis (makes food for the plant)

C – Stem – Transports materials throughout the plant

D – Roots – Takes in water

Explain the function of the three parts of the seed.

Seed Coat – Protects the developing embryo

Embryo – The developing baby plant

Cotyledon – Stored food for the embryo & young seedling

Why does the seedling at right need the cotyledon after germination?

The Cotyledon provides the seedling with food until its leaves can fully function & photosynthesis can take place

What do all organisms need to stay alive?Energy from foodHow do plants make their food?PhotosynthesisWhere does photosynthesis occur in a plant?ChloroplastsWhat is needed for photosynthesis to occur?Carbon dioxide, water, and sunlightWhat is the formula for photosynthesis?CO2 + H2O + Sunlight Glucose + O2 + H2O

ILS QuestionThe flowchart below represents the process of photosynthesis. One step in the process is labeled X.

Which activity occurs at X?Carbon dioxide and water are used to make sugarWhere does photosynthesis take place?Chloroplasts

ILS QuestionBase your answers to questions 1 and 2 on the diagram to the right and on your knowledge of science. The diagram shows a plant that carries out photosynthesis.

1. Sunlight is absorbed by the leaves. What two substances are also taken in by the plant for photosynthesis to occur?

2. Identify one product, other than sugar, that results from the process of photosynthesis.

What is cellular respiration?The chemical process that cells

use to release energy from food molecules

Where does cellular respiration occur inside of the cell?Mitochondria

What is the formula for cellular respiration? O2 + Food + H2O Energy + CO2 + H2O

What are the waste products of cellular respiration?Carbon dioxideWater

How are these waste products of respiration removed from our body?Exhale (CO2 & H2O)Sweating (H2O)Urine (H2O)

ILS QuestionThe diagram below shows a life process taking place within a cell.

What life process is shown?Where does this life process take place within the cell?

Describe what is occurring in the diagram below

Explain the difference between a producer & a consumer?Producer – make their

own foodConsumer – must obtain

food from the environment

Give an example of a producer. Consumer.

Producers, consumers, and decomposers are three types of organisms that obtain nutrients in different ways. In the chart below, identify each organism as a producer, consumer, or decomposer based on its source of nutrients.

ILS Question

ILS Question1. Identify the living and

nonliving parts of the fish tank ecosystem.

2. Identify the producers & consumers in the fish tank.

3. How are the living organisms in the fish tank interdependent on each other for survival?

Identify the 4 types of consumers.Herbivores – eats plantsOmnivore – eats both plant &

animalsCarnivores – eats animalsDecomposers – eats long dead

organisms (decompose wastes)

ILS QuestionThe diagram below shows a food chain.

1. Identify the herbivore in the diagram above.2. Identify the carnivores in the diagram above.

What is metabolism? All of the chemical activities in an

organism’s body

What factors influence your metabolism? Hormones Exercise Diet

If you have an imbalance of required nutrients, what may happen? Weight gain Weight loss Disease

ILS QuestionInsulin and glucagon are hormones that affect blood sugar levels. The diagram below shows the feedback system used by the human body to increase and decrease blood sugar levels.

This feedback system is one way that the human body(1) circulates gases (2) maintains equilibrium(3) destroys viruses(4) transports nutrients