Explanation:
an animal that transfers pollen from flower to flower
hope it helps!
Carolyn observed a freshwater plant, Elodea, in a small aquarium filled with freshwater on her desk. In one five-minute period, Carolyn counted 32 bubbles that formed on the plant’s leaves and were released into the water. She then moved the aquarium from her desk to a sunlit window and observed the Elodea again. In a second five-minute period, Carolyn observed 194 bubbles form and be released by the Elodea into the water.
a. Explain how the bubbles released by the Elodea signify that the plant is cycling matter. Provide evidence to support your answer.
Hello there! Photosynthesis
Objectives:
(Adaptable to grade levels 6-9)
The student will:
1. Observe evidence of photosynthesis in a water plant.
2. Assemble the equipment needed to measure the rate of photosynthesis in
elodea (water plant).
3. Count bubbles of oxygen gas given off by elodea to determine the rate of
photosynthesis.
4. Change the conditions of photosynthesis by altering light intensity and
carbon dioxide amount, and determine the effects on the photosynthesis rate.
5. Prepare a graph of the collected data and analyze it.
Materials Needed:
(For each group of four students)
elodea (water plant) lamp (40 watt)
test tube razor blade (single-edge)
dechlorinated water (room temperature) tape
sodium bicarbonate powder (baking soda) clock or timer
metal stand with rod or test tube rack metric ruler
Strategy:
PART A. Setting Up the Experiment
1. Obtain a sprig of elodea. Remove several leaves from around the cut end of
the stem. Slice off a portion of the stem at an angle and lightly crush the
cut end of the stem.
2. Place the plant into the test tube, stem end up, filled with water.
3. Secure the test tube to a metal stand with tape or place the test tube in a
test tube rack.
PART B. Running the Experiment
1. Place a 40 watt lamp 5 cm from the plant. After one minute, count and
record the number of oxygen bubbles rising from the cut end of the stem.
Count bubbles for five minutes. If bubbles fail to appear, cut off more of
the stem and recrush.
2. Run a second five-minute trial. Record and average your results.
3. Move the lamp so it is 20 cm from the plant. After one minute count and
record bubbles for two five-minutes trials. Again, average and record your
results.
4. Add a pinch of sodium bicarbonate powder to the test tube. Place the lamp
5 cm from the test tube. After one minute, record bubbles for two five-
minute trials. Average and record your results.
5. Prepare a graph of your results. Use the average number of bubbles for the
vertical axis. Use the type of environmental condition for the horizontal
axis.
Performance Assessment:
The students will answer these questions using specific values from the
investigation. Diagrams may be included.
1. How does this investigation demonstrate that plants give off oxygen during
photosynthesis? Explain your answer based on your observations.
2. How does the rate of photosynthesis change when the light source is moved
from a distance of 5 cm to 20 cm?
3. How does the rate of photosynthesis change when sodium bicarbonate is added
to the water?
Conclusions:
Plants use green pigments called chlorophylls to trap light energy. The
chlorophylls give a plant its green color. Inside the cells that have
chloroplasts, the light energy is used to make a simple sugar called glucose.
The process by which plants use light energy to make glucose is called
photosynthesis.
During this process of sugar production, carbon dioxide combines with water to
form glucose and oxygen is released. Oxygen that is produced in photosynthesis
is given off as a gas. If a lot of oxygen is being given off, photosynthesis is
occurring rapidly. If little oxygen is being given off, photosynthesis is
occurring slowly. The amount of trapped light energy and the amount of carbon
dioxide available affects the rate of photosynthesis.
The purpose of adding sodium bicarbonate powder to the water increases the
amount of carbon dioxide in the water.
This investigation can be performed with water plants grown in many parts of
the world, except regions that have permanent ice.
Return to Biology Index
The bubbles released by the Elodea signify that the plant is cycling matter because:
carbon is being fixedoxygen is being releasedCarbon in the form of carbon dioxide is being fixed in the Elodea through the process of photosynthesis according to the following equation:
[tex]6CO_2 + 6H_2O ---> C_6H_1_2O_6 + 6O_2[/tex]
During respiration by the same Elodea, the carbohydrate produced would be broken down in a reaction with oxygen to produce carbon dioxide and water:
[tex]C_6H_1_2O_6 + 6O_2 ---> 6CO_2 + 6H_2O[/tex]
Thus, important materials such as carbon and oxygen are being recycled in the photosynthetic process.
More on matter recycling can be found here: https://brainly.com/question/1192312
why we must control number of breeding animals captivity excess
Answer:
Captive breeding is generally undertaken when a species has reached critical population levels where risk of extinction is likely. ... Protect the population against disease. Preserve the gene pool to avoid problems of inbreeding. Provide animals to re-establish or restock wild populations when needed.
Is The Pamlico Sound a potable water source ? If so , Why ?
Answer:
cfffccecdwcfwd
Explanation:
Answer:
The sounds are shallow, relatively sheltered embayments that are fed by large volumes of fresh water from the rivers draining into them.
HELP PLS! XX= Female XY=Male.
You and your spouse are expecting your first child. What is the probablility for your child to be a male? why?
What would the probablility for your second child to be female? Why?
Answer:
Half
Explanation:
The probability of getting a boy or girl is
1/2
8. Which of the following is a limiting factor for a ground squirrel population?
a. a population of tree squirrels
b. a population of hawks
c. genetic variability
d. breeding season
compare how is the overall chemical reaction for cellular respiration related to the overall chemical reaction for photosynthesis
Answer: cellular respiration reverses the overall photosynthetic reaction, but less efficiently. The useful energy output of respiration is less than the energy input required for photosynthesis.
Explanation:
overall photosynthetic reaction
Light energy + 6CO2 + 6H2O —> C6H12O6 + 6O2
cellular respiration
C6H12O6 + 6O2 —> 6CO2 + 6H2O + energy (as ATP and heat)
football measurnet and draw it
Answer:
eefedsgechtghjffrturgdhudcn7ddrzvj
True or False: Ecological succession happens very quickly, usually just a few years. True False
Answer:
I think is false
Explanation:
please mark me as brainliest
Answer: FALSE IS THE ANSWER
Explanation: BE ME FRIEND SND GIVE ME BRAINLYEST
Identify What system moves blood
through the body?
Answer:
the circulatory system
Explanation:
Answer:
The Cardiovascular System
Explanation:
The Cardiovascular System is made up of the heart and arteries which pump blood through the body.
cell cycle and cell division with diagram
Answer:
hope it helps......good day!Many of the Mauryan Empire’s huge pillars originally were transported from quarries in __________ India.
A.
central
B.
eastern
C.
southern
D.
western
Please select the best answer from the choices provided
A
B
C
D
Answer:
I think its A. Central. Sorry if im incorrect
Answer: B. Southern
Explanation:
What effect does dietary protein have on the body?
Answer:
Even mostly or entirely plant-based diets can be high in protein. Protein is an essential part of a healthy diet. It helps to build and repair muscle, organs, and bones. High-protein diets have also been shown to be helpful with reducing fat, losing weight, increasing satiety, or a feeling of fullness, and retaining muscle.
Which is true of all organs in the human body? They are made up of two or more tissue types. They produce red and white blood cells. They remove harmful substances from the body. They are composed of one main type of cell.
Answer:
They are made up of two or more tissue types.
how larvae of fish get nutrition
Answer:
The larval period of fish development is certainly the most complex from the aspect of nutrition. During this period, the digestive tract is not fully phisiologicaly developed.
Explanation:
The nutrition of larvae is largely based on the consumption of zooplankton. Such food must be distributed to larvae 10-24 times a day.
Whales, birds, snakes, and fish need oxygen to survive. Even though they share this trait, these animals are not related because they do NOT —
A. inherit genetic instructions passed down from the same parents.
B. lives in the same type of environment.
C. eat the same types of food.
D. need oxygen to survive in their environments.
Answer:
A. inherit genetic instructions passed down from the same parents.
These animals are not related because they do not inherit genetic instructions passed down from the same parents. The correct option is A.
What is inheritance?The transmission of traits and otherwise information through one generation of individuals or cells to the next is referred to as inheritance.
Inheritance can occur through one of two mechanisms: genetic inheritance or epigenetic inheritance.
Deoxyribonucleic acid is another name for DNA. It is the genetic structure that is in charge of storing information.
A nitrogen base, sugar, and phosphate backbone make up DNA. Inheritance occurs when genetic information is passed from a parent to a child, and thus from one generation to the next.
A gene pair's two alleles are inherited, one from each parent. Alleles interact with one another in various ways. These are referred to as inheritance patterns.
Thus, the correct option is A.
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ASAP ASAP 50 POINTS
In three to four sentences explain both the positive and negative effects of mutations.
Answer:
positive mutations means positive impacts of mutations i.e it leads to mutations. while negative effects leads to chromatic aberration that occurs during phenyl ketonuria!
If this helped you mark me brainliest (=^o^=)
Even though mitosis and meiosis produce cells for different purposes, there are similarities
between the two processes. Which statement most accurately states how the two types of cell
division are alike?
Sister chromatids separate during anaphase II and mitotic anaphase is the statement most accurately states how the two types of cell division are alike. Hence, option D is correct.
What is Sister chromatids?Each chromosome is made up of two full-length DNA molecules joined at the centromere after DNA replication as part of cell division. They are two distinct DNA molecules known as sister chromatids.
Sister chromatids are two identical copies of the same chromosome that are produced by DNA replication and joined by a structure known as the centromere. They are divided during cell division, with one copy of each chromosome going to each daughter cell.
A chromatid is one of the two identical halves of a chromosome that has undergone replication ahead of cell division. The two "sister" chromatids are connected at the centromere, a constricted region of the chromosome.
Thus, option D is correct.
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The options are missing-
The daughter cells produced by both processes are haploid.
Homologous chromosomes cross over during the first prophase stage in both processes.
DNA replicates before mitotic prophase and prophase II.
Sister chromatids separate during anaphase II and mitotic anaphase.
Three billion years ago plants began the process of photosynthesis. Why would
the appearance of plants that use photosynthesis to produce their food affect the
increase in atmospheric oxygen and the decrease in carbon dioxide?
Answer:
because plants take in carbon dioxide and produce and release oxygen
Answer:
The appearance of plants and their color would affect the atmospheric oxygen and would attract more of this chemical. The decrease in carbon dioxide would cause the plant to change in shape.
Explanation:
It depends on the type of the plant.
HURRY WHAT IS THE ANSWER IM TIMED ON THIS?!?!?!
Answer:
3. A solution where there are less solutes in the solution than in the cell.
why are fossil fuels considered finite?
Answer:
A finite resource is something that can only be consumed once without possibility of being recycled for re-use. Because fossil fuels are burned, they cannot be reused and are therefore a finite resource.
Explanation:
Which planet is the smallest and the closest to the Sun?
Earth
Mars
Mercury
Venus
Answer:
yes its Mercury
Explanation:
cuz its da Brainly User my man =)
The smallest and closest planet to the sun is Mercury.
Solar systemThere about nine planets in the solar system. These planets orbit the sun at different rates.
The planets that make-up the solar systemThe planets that make up the solar system include the following, starting from the closest to the sun to the farthest from the sun.
MercuryVenusEarthMarsJupiterSaturnUranusNeptunePlutoThus, the smallest and closest planet to the sun is Mercury.
Learn more about planets here: https://brainly.com/question/13106554
what is produced inside the nucleus during transcription that make it possible to move genetic information outside the nucleus?
A. DNA
B. mRNA transcript
C. Proteins
Answer:
b
Explanation:
mRNA transcript
Which of the following statements about exponential growth curves is true?
- a. Exponential growth curves are common for R-selected species.
b. Exponential growth curves show fast growth rates followed by slow growth rates.
C. No organisms in nature experience exponential growth rates.
d Exponential growth curves are S-shaped.
Please select the best answer from the choices provided
B
ОООО
Answer:
Which of the following statements about exponential growth curves is true?
- a. Exponential growth curves are common for R-selected species.
Explanation:
The statement that is true about exponential growth curves is as follows:
Exponential growth curves are common for R-selected species.Thus, the correct option for this question is A.
What is an Exponential growth curve?An Exponential growth curve may be defined as a type of growth curve that significantly illustrates greater increases in the population of organisms with respect to time. It immediately represents the growth with extreme fast rates.
Exponential growth is followed by the continuous breeding population which contains more individuals than a similar population breeding annually. It includes examples like some insects, r-selected species, etc.
The shape of the exponential growth curve is J-shaped. It represents only fast growth rates. While the logistic growth curve shows fast growth rates followed by slow growth rates. It possesses a shape known as S-shape. It represents the growth rate of k-selected species.
Therefore, the correct option for this question is A.
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If a certain band on one chromatography strip has been identified as
chlorophyll a, chlorophyll a could be identified on a second
chromatography strip by looking for a band
A. with no colour
B. of darker colour
C. in reverse position
D.in a parallel position
Answer:
D
Explanation:
The same chlorophyll can be identified if it moves the same distance up the second chromatography strip as it did on the given chromatography strip.
Chromatography strip by looking for a band in a parallel position.
What is meant by Chromatography?The process of chromatography separates molecules because of the different solubilities of the molecules in a selected solvent. In paper chromatography, paper marked with an unknown, such as plant extract, is placed in a developing chamber with a specified solvent.Chromatography strip by looking for a band in a parallel position.
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I neeeeeeed help hurrrryyyy
Answer:
Population
Explanation:
If there's a high death rate then people would want the population to increase because the disease or whatever scenario is killing the people.
I hope this helped and if I'm wrong somebody please correct me :)
plants preapare their good in their food in their root
Answer:
In the presence of light, chlorophyll (a substance that gives the leaves a green color) releases oxygen and produces carbohydrates, which enable the plant to grow. This complex process is called photosynthesis.
Explanation:
The roots are used to take dissolved mineral elements from the soil. The root is not capable of absorbing even the smallest organic or solid element. This means that it is important that the soil contains a certain amount of water, but also microorganisms, which have the task of decomposing organic matter and releasing the mineral elements from which it is composed.
what is a glycoprotein? and what is one of the uses of glycoproteins?
i'll mark you as a brainliest if you help.
Answer: it’s is proteins that are conjugated with a small number of monosaccharides or short typically branched chains of carbohydrates ( oligosaccharides). And one use of glycoproteins is they have something to do with immune system examples the molecules of as such as antibodies ( immunoglobulins) which they just interact with antigens.
Explanation: hope this help I take biology it can be tough.
| Suggest two environmental factors that enable pine trees to photosynthesise in spring and summer in
Switzerland, but not in winter.
Answer: Temperature and light
Explanation:
In winter, day length is shorter than in spring/summer and the sun does not rise as high in the sky. There is also more cloud cover, fog and snow to reduce access and intensity of light.
Colder temperatures reduce metabolic activity, and at temperatures below zero, water uptake is prevented, which reduces transport of nutrients, and icing of needles and snow cover reduce access to carbon dioxide.
In spring/summer sunlight is more readily available, temperatures more conducive to carbon dioxide uptake and transpiration.
The two environmental factors are Temperature and light
The following information should be considered:
In winter, day length is less than in spring/summer and the sun does not rise as high in the sky. There is also more cloud cover, fog and snow to reduce access and intensity of light. Colder temperatures decreased metabolic activity, and at temperatures below zero, water uptake should be prevented, which decreased transport of nutrients.Learn more: https://brainly.com/question/20492533?referrer=searchResults
Which process do all organisms do when performing cellular respiration?
Answer:
Glycolysis
Explanation:
Glycolysis is the first step of cellular respiration, where glucose is turned into 2 pyruvate molecules.
This step happens in all living organisms, since it does not require oxygen and also occurs in the cytoplasm, which all cells have.
So, glycolysis is the process that all organisms do during cellular respiration.
how are we able to hear
Answer:
Sound waves enter the outer ear and travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear.
Hope this helps!