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Energy Flow
| Question | Answer |
|---|---|
| Name the organelle in a plant cell that photosynthesis occurs. | chloroplast |
| Name the organelle that cellular respiration occurs in. | mitochondria |
| Name the main organ of a plant that photosynthesis occurs in. | leaf |
| What is the waxy, waterproof covering of a leaf called? | cuticle |
| Vascular tissue (xylem and phloem) is found in a? | vein |
| The type of vascular tissue that conducts water throughout the plant? | xylem |
| The type of vascular tissue that conducts food (glucose) throughout the plant? | phloem |
| What is the "middle layer" of a leaf called? | mesophyll |
| What two layers of cells contain chloroplasts in a leaf? | the palisade layer and spongy mesophyll cells |
| Pores in a leaf that water enters and exists through are called? | stomata |
| Open and close to control how much water enters the leaf's pores | guard cells |
| The outer portion of veins (surrounding the xylem and phloem) is the | bundle sheath cells |
| Give four examples of autotrophs. | plants, algae, some bacteria, some protists (Euglena) |
| what percent of available energy comes from chemoautotrophs | 5% |
| What do autotrophers..aka producers..do? | convert energy from the sun into chemical energy in the form of glucose during photosynthesis |
| In our fair analogy, the "check" is what molecule? | glucose |
| In our fair analogy, the "cash" is what molecule? | ATP |
| Which form of energy can cells use to power its activities? | ATP |
| What is the chemical reaction for photosynthesis? | carbon dioxide + water yields glucose + oxygen |
| What is the chemical reaction for cellular respiration? | glucose + oxygen __> carbon dioxide + water |
| True or false. Plants carry out both photosynthesis and cellular respiration. | True. |
| Each level in a food chain or food web? | trophic level |
| Organisms that cannot produce their own food | heterotrophs or consumers |
| Eat only plants | Herbivores |
| Eat only animals | Carnivores |
| Eat both plants and animals | omnivores |
| Organisms that chemically break down organic matter into smaller pieces; external digestion | decomposers |
| Organisms that physically consume and digest dead organic matter | detritrivores |
| What is the first trophic level in every food chain? | primary producer |
| 2nd trophic level? | primary or first order consumer |
| 3rd trophic level? | secondary or second order consumer |
| 4th trophic level? | tertiary or third order consumer |
| 5th trophic level? | quarternary or fouth order consumer |
| 6th trophic level? | quinary or fifth-order consumer |
| What does the ten percent rule (or law of 10) say? | only 10 percent of the energy available at one trophic level is available at the next trophic level |
| What happens to most of the energy before it is passed on to the next trophic level? | it is passed on as heat |
| What unit follows the numbers in a pyramid of energy? | calories or kilocalories |
| If the producers have 20,000 kcal of energy available to them, how much energy will the primary consumers have? | 2,000 kcal |
| If the producers have 20,000 kcal of energy available to them, how much energy will the secondary consumers have available to them? | 200 kcal |
| If the producers have 20,000 kcal of energy available to them, how much energy will the tertiary consumers have available to them? | 20 kcal |
| What is the amount of living tissue (carbon and hydrogen) is available at each trophic level? | biomass |
| What unit follows the numbers in a biomass pyramid? | kilograms |
| Which level of a biomass pyramid do we typically see the largest mass? | primary producer |
| What do the arrows depicted in food chains or food webs represent? | the flow of energy between organims |
| True or false. Decomposers are not included in the food web. | true |
| What are decomposers important? | they recycle matter from decaying organisms back into the ecosystem |
| True or false. The number of producers found in an ecosystem or biome is far greater than in the higher trophic levels. | true |
| True or false. The biomass pyramid also follows the rule of ten. | false |
| True or false. The amount of organisms in each trophic level is directly related to how much energy is stored in that trophic level. | true |