Presentation is loading. Please wait.

Presentation is loading. Please wait.

Beechdrops (Epifagus virginiana) are leafless plants that lack chlorophyll. Beechdrops get their nourishment from the roots of beech trees, which reduces.

Similar presentations


Presentation on theme: "Beechdrops (Epifagus virginiana) are leafless plants that lack chlorophyll. Beechdrops get their nourishment from the roots of beech trees, which reduces."— Presentation transcript:

1 Beechdrops (Epifagus virginiana) are leafless plants that lack chlorophyll. Beechdrops get their nourishment from the roots of beech trees, which reduces the amount of nutrients available to the trees themselves. This interaction is best described as — A. predatory B. parasitic C. commensalistic D. mutualistic CPS

2 According to this food web, which of these is an omnivore? A. Caterpillar B. Mouse C. Ant D. Fly larva CPS

3 Which molecule provides most of the energy used to drive chemical reactions in cells? A. DNA B. RNA C. ATP D.ADP CPS

4 PHOTOSYNTHESIS Light To create Purpose: Plants use light to create sugars

5 Scientists Van Helmont: plants gain most of mass from H 2 O. Priestly: Plants release O 2. Ingenhousz: Used Priestly’s experiment and found that plants need sunlight to make O 2.

6

7 What is photosynthesis? The process in which plants convert light energy into chemical energy (food glucose). Happens in the chloroplast

8 Photosynthesis Equation PHOTOSYNTHESIS EQUATION: It will be on every quiz and your unit test! Carbon dioxide + water + E → glucose + oxygen 6CO 2 + 6H 2 O + E → C 6 H 12 O 6 + 6O 2 (reactants)(products ) Light Enzymes light enzymes takes inproduces

9 Chloroplast Thylakiod Thylakiod: sac like membranes Stroma Stroma: space between thylakiods Grana Grana: stack of thylakiods

10 Within the chloroplast pictured above are disc like structures arranged in stacks called grana. The stack like membranes contains pigments that absorb light energy. The individual disc- like shaped structures labeled A are called ____. A. chlorophyll B. thylakoids C. stroma D. Golgi apparatus A B CPS

11 Which word summary word equation best describes a process that directly requires light energy? A. water + carbon dioxide  glucose + oxygen B. glucose + glucose  maltose + water C. glucose  alcohol + carbon dioxide + ATP D. water + glucose  oxygen + carbon dioxide  ATP CPS

12 Vein

13 Water enters the plant through the roots and travels up to the leaf through the veins. Water then travels to each cell through a process known as OSMOSIS.

14 Stomata Stomata are the little “holes” on a plant leaf that regulates the gas exchange in plants.

15 Carbon dioxide then travels to each cell through a process known as Diffusion. Carbon dioxide enters the leaf through the stomata.

16 Which structure regulates gas exchange during the processes of photosynthesis and respiration? A. Q B. R C. S D. T CPS

17 Products and Reactants in Photosynthesis Reactants- Carbon Dioxide and Water Products- Glucose and Oxygen There is NO ATP gain during photosynthesis! *****Remember the ATP Cycle*****

18 Light and Pigments Photosynthesis depends on pigments -proteins that absorb some light and reflect others.  Examples: chlorophyll and carotene

19 Light and Pigments Chlorophyll absorbs blue, violet, and red light, but reflects green light.  This is why plants are green. Carotene reflects orange light.

20 Section 8-3 Figure 8-7 Photosynthesis: An Overview Photosynthesis overview: (PRODUCTS) LIGHT O2O2 Sugars (glucose) CO 2 Light- Dependent Reactions Calvin Cycle H2OH2O (REACTANTS)

21 V B GYOR Chlorophyll b Chlorophyll a Figure 8-5 Chlorophyll Light Absorption

22 The 2 Steps to Photosynthesis 1. Light-dependent reactions 2. Calvin Cycle (AKA: Light-independent reactions)

23 Step 1: Light-Dependent Reactions *requires light* Purpose Purpose: To make oxygen used by other organisms Location: Location: Thylakoid membranes

24 Step 1: LDR ReactantsProducts 6H 2 O Light Energy 6O 2

25 Step 1: LDR How it works: H 2 O is broken up by light into H+ and O 2. O 2 is released through stomata

26 Step 2: The Calvin Cycle (Light-Independent Reactions) * does not need light* Purpose: Purpose: To make glucose from CO 2 Location: Location: STROMA

27 Step 2: Calvin cycle ReactantsProducts 6CO 2 Glucose

28 Calvin Cycle How it works: 6 CO2 enter the cycle and are converted into glucose. With TWO turns of Calvin Cycle, you make ONE glucose.

29 What are the two steps of Photosynthesis listed in the correct order? A. Glycolysis & Krebs cycle B. Calvin cycle & L.D.R. C. L.D.R. & Kreb’s cycle D. L.D.R & Calvin cycle CPS

30 Which compound is a product of photosynthesis and a reactant for cellular respiration? A.carbon dioxide B.water C.glucose D.energy CPS

31 Why are photosynthesis and cellular respiration often considered opposites? A. Photosynthesis produces twice as many ATP molecules as cellular respiration does. B. Water is released during photosynthesis and consumed during cellular respiration. C. Photosynthesis occurs during the day, and cellular respiration occurs at night. D. Oxygen is produced during photosynthesis and used during cellular respiration CPS

32 BIG PICTURE Plants release oxygen Animals bring in oxygen Plants create glucose Animals eat glucose Animals breathe out water Plants bring in water

33 BIG PICTURE Plants and animals work together to create the carbon cycle:OxygenGlucose Carbon Dioxide water


Download ppt "Beechdrops (Epifagus virginiana) are leafless plants that lack chlorophyll. Beechdrops get their nourishment from the roots of beech trees, which reduces."

Similar presentations


Ads by Google