1. Select the term from each drop down box to correctly complete each sentence.(2 points)
The process of photosynthesis is essential in the carbon cycle. Photosynthesis removes
from the atmosphere and produces/releases
back into the atmosphere.
The correct answer is chloroplasts and mitochondria. chloroplasts are involved in converting energy during photosynthesis, while mitochondria are involved in converting energy during cellular respiration.
The process of photosynthesis is essential in the carbon cycle. Photosynthesis removes carbon dioxide from the atmosphere and produces/releases oxygen back into the atmosphere.
2. A student is completing an experiment comparing plants in two areas. Both areas have the same type of plants with equal sunlight and equal available water. Area 1 has a high amount of carbon dioxide in the atmosphere, and area 2 has a low amount of carbon dioxide in the atmosphere.
How does the rate of photosynthesis in area 1 compare to the rate of photosynthesis in area 2?
(1 point)
Responses
The rate of photosynthesis increases with an increase in carbon dioxide; therefore, area 1 will have a higher rate of photosynthesis compared to area 2.
The rate of photosynthesis increases with an increase in carbon dioxide; therefore, area 1 will have a higher rate of photosynthesis compared to area 2.
The rate of photosynthesis increases with a decrease in carbon dioxide; therefore, area 1 will have a lower rate of photosynthesis compared to area 2.
The rate of photosynthesis increases with a decrease in carbon dioxide; therefore, area 1 will have a lower rate of photosynthesis compared to area 2.
The rate of photosynthesis decreases with an increase in carbon dioxide; therefore, area 1 will have a lower rate of photosynthesis compared to area 2.
The rate of photosynthesis decreases with an increase in carbon dioxide; therefore, area 1 will have a lower rate of photosynthesis compared to area 2.
The amount of carbon dioxide in the atmosphere has no affect on the rate of photosynthesis; therefore, area 1 and area 2 will have the same rate of photosynthesis.
The rate of photosynthesis increases with an increase in carbon dioxide; therefore, area 1 will have a higher rate of photosynthesis compared to area 2.
Plants are known as autotrophs. That means that they can make their own food. Plant cells do so by taking in
gas and
. Those are the
used in the chemical reactions that occur during photosynthesis.
Plants are known as autotrophs. That means that they can make their own food. Plant cells do so by taking in carbon dioxide gas and water. Those are the raw materials used in the chemical reactions that occur during photosynthesis.
4. During the processes of photosynthesis and cellular respiration, energy is converted. The law of conservation of energy is observed. Which cell organelles are involved in converting energy from one form to another?(1 point)
Responses
cell membrane and golgi body
cell membrane and golgi body
nucleus and cytoplasm
nucleus and cytoplasm
chloroplasts and mitochondria
chloroplasts and mitochondria
lysosomes and ribosomes
5. Plants use the solar energy in sunlight to drive photosynthesis and produce glucose. The energy stored in the glucose is then released by the process of _____.(1 point)
Responses
photosynthesis
photosynthesis
cellular respiration
cellular respiration
genetic engineering
genetic engineering
protein synthesis
The correct answer is cellular respiration. The energy stored in glucose produced during photosynthesis is released by the process of cellular respiration.
6. Jaylah and Simon were discussing what they learned in Science class today. Jaylah asked Simon the following question, "If oxygen is removed from a plant's environment, what would you expect to happen to the plant's ability to break down glucose sugar and produce the energy molecule of ATP?"
What is the correct response that Simon should give Jaylah?
(1 point)
Responses
The plant's ability to break down glucose sugar and produce the energy molecule of ATP would be affected because photosynthesis would not have a needed reactant to undergo all the chemical reactions.
The plant's ability to break down glucose sugar and produce the energy molecule of ATP would be affected because photosynthesis would not have a needed reactant to undergo all the chemical reactions.
The plant's ability to break down glucose sugar and produce the energy molecule of ATP would not be affected because photosynthesis should occur normally.
The plant's ability to break down glucose sugar and produce the energy molecule of ATP would not be affected because photosynthesis should occur normally.
The plant's ability to break down glucose sugar and produce the energy molecule of ATP would be affected because cellular respiration would not have a needed reactant to undergo all the chemical reactions.
The plant's ability to break down glucose sugar and produce the energy molecule of ATP would be affected because cellular respiration would not have a needed reactant to undergo all the chemical reactions.
The plant's ability to break down glucose sugar and produce the energy molecule of ATP would not be affected because cellular respiration should occur normally.
The correct response that Simon should give Jaylah is: "The plant's ability to break down glucose sugar and produce the energy molecule of ATP would be affected because cellular respiration would not have a needed reactant to undergo all the chemical reactions."
carbon dioxide reactant or product
water reactant or product
glucose reactant or product
oxygen reactant or product
carbon dioxide - reactant
water - reactant
glucose - product
oxygen - product
Photosynthesis and Chlorophyll
A pigment is a substance that absorbs light of particular wavelengths. Plants contain multiple types of pigment such as chlorophyll and carotenoids. If you see a leaf that is green or green-yellow in color, that is due to a pigment in the leaf called chlorophyll. Sunlight, which is categorized as "white" light, contains all of the colors of the spectrum. When it shines on the plant leaf, the chlorophyll absorbs some light wavelengths and it reflects back most of the green and yellow light wavelengths. That is why you see the green or green-yellow color.
A spectrophotometer is an instrument that can be used to measure the amount of light absorbed by a pigment. The graph below shows the percent of light energy absorbed for the different light wavelengths. The highest peaks represent the colors that the chlorophyll absorbs the most, and therefore, they are seen the least.
blue green yellow orange red
Question 1
8. According to the graph above, which of the color is absorbed the most by chlorophyll b?(1 point)
Responses
green
green
blue
blue
yellow
yellow
red
red
Question 2
9. According to the graph above, which chlorophyll is better at absorbing the orange-red light wavelength?(1 point)
Responses
chlorophyll a
chlorophyll a
chlorophyll b
chlorophyll b
Question 3
10. According to the graph above, which chlorophyll is better at reflecting dark green light wavelengths and making plants look green to our eyes?(1 point)
Responses
chlorophyll b
chlorophyll b
Question 1: According to the graph above, the color absorbed the most by chlorophyll b is green.
Question 2: According to the graph above, chlorophyll a is better at absorbing the orange-red light wavelength.
Question 3: According to the graph above, chlorophyll a is better at reflecting dark green light wavelengths and making plants look green to our eyes.
11. A scientist fills a glass container with water and places an aquatic plant inside the container, then closes the lid and places the container in direct sunlight. The scientist observes small bubbles on the surfaces of the plant’s leaves on days 1 and 2, but no bubbles on day 3. If the scientist concludes that the bubbles were caused by photosynthesis, then which reactant should be added to the water in order for the bubbles to reappear?
(1 point)
Responses
glucose sugar
glucose sugar
oxygen gas
oxygen gas
carbon dioxide gas
carbon dioxide gas
hydrogen gas
If the bubbles were caused by photosynthesis, the reactant that should be added to the water in order for the bubbles to reappear is carbon dioxide gas.
2. Using the chemical equation for photosynthesis, choose the correct number of atoms from the drop down box for the element shown in the reactants and products.(6 points)
REACTANTS PRODUCTS
Carbon
Carbon
Hydrogen
Hydrogen
Oxygen
Oxygen
REACTANTS: Carbon - 6, Hydrogen - 12, Oxygen - 6.
PRODUCTS: Carbon - 6, Hydrogen - 12, Oxygen - 6.
13-15. Match each phrase to the correct biochemical process.(3 points)
Photosynthesis Cellular Respiration
This chemical reaction takes place in the presence of oxygen and releases stored energy.
Photosynthesis – This chemical reaction takes place in the presence of oxygen and releases stored energy.
Cellular Respiration – This chemical reaction takes place in the presence of oxygen and releases stored energy.
The sugars produced from this process can be used immediately or stored for growth or later use.
Photosynthesis – The sugars produced from this process can be used immediately or stored for growth or later use.
Cellular Respiration – The sugars produced from this process can be used immediately or stored for growth or later use.
This chemical reactions is driven by the absorption of solar energy in sunlight.
Photosynthesis – This chemical reactions is driven by the absorption of solar energy in sunlight.
Cellular Respiration – This chemical reactions is driven by the absorption of solar energy in sunlight.
Photosynthesis - This chemical reaction takes place in the presence of oxygen and releases stored energy.
Cellular Respiration - The sugars produced from this process can be used immediately or stored for growth or later use.
Photosynthesis - This chemical reactions is driven by the absorption of solar energy in sunlight.
16. Identify the products and reactants of cellular respiration.(4 points)
Reactant of Cellular Respiration Product of Cellular Respiration
carbon dioxide gas
Reactant of Cellular Respiration – carbon dioxide gas
Product of Cellular Respiration – carbon dioxide gas
water
Reactant of Cellular Respiration – water
Product of Cellular Respiration – water
oxygen gas
Reactant of Cellular Respiration – oxygen gas
Product of Cellular Respiration – oxygen gas
glucose
Reactant of Cellular Respiration – glucose
Product of Cellular Respiration – glucose
Reactant of Cellular Respiration – oxygen gas, glucose
Product of Cellular Respiration – carbon dioxide gas, water, energy (in the form of ATP)
17. Identify the organisms in the food web below as either producers or consumers.
(3 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
AUTOTROPH/PRODUCER HETEROTROPH/CONSUMER
RabbitGrassBlackberriesSlugFoxSparrowhawk
AUTOTROPH/PRODUCER: Grass, Blackberries.
HETEROTROPH/CONSUMER: Rabbit, Slug, Fox, Sparrowhawk.
18. Explain why food webs and energy pyramids show the flow of energy but the cycling of matter.(1 point)
Responses
The Sun continually replenishes the Earth's matter, but the Earth has a constant amount of energy.
The Sun continually replenishes the Earth's matter, but the Earth has a constant amount of energy.
The Sun continually replenishes the Earth's energy and matter.
The Sun continually replenishes the Earth's energy and matter.
The Sun continually replenishes the Earth's energy, but the Earth has a constant amount of matter.
The Sun continually replenishes the Earth's energy, but the Earth has a constant amount of matter.
The Earth has a constant amount of energy and matter.
The Earth has a constant amount of energy and matter.
The Sun continually replenishes the Earth's energy, but the Earth has a constant amount of matter.
19. Consider the following food chain:
Green Plant --> Grasshopper --> Blue Bird --> Hawk
Identify each part of the above food chain.
(2 points)
Producer Primary Consumer Secondary Consumer Tertiary Consumer
Hawk
Producer – Hawk
Primary Consumer – Hawk
Secondary Consumer – Hawk
Tertiary Consumer – Hawk
Green Plant
Producer – Green Plant
Primary Consumer – Green Plant
Secondary Consumer – Green Plant
Tertiary Consumer – Green Plant
Blue Bird
Producer – Blue Bird
Primary Consumer – Blue Bird
Secondary Consumer – Blue Bird
Tertiary Consumer – Blue Bird
Grasshopper
Producer – Grasshopper
Primary Consumer – Grasshopper
Secondary Consumer – Grasshopper
Tertiary Consumer – Grasshopper
Producer - Green Plant
Primary Consumer - Grasshopper
Secondary Consumer - Blue Bird
Tertiary Consumer - Hawk