Your nervous system (brain and nerves) sends a message to activate your skeletal (voluntary) muscles. Your muscle fibers contract (tense up) in response to the message. When the muscle activates or bunches up, it pulls on the tendon. Tendons attach muscles to bones.
Jake set up an experiment. He set two aquariums with five fish of the same type and size. Aquarium one was very small, only one cubic foot. Aquarium 2 was very large at 10 cubic feet. Each day the fish were fed the same amount of food and vitamins, at the end of 5 months Jake measured the fish by length. His results are shown in the bar graph above. What might be the question Jake is asking in his experiment?
A. What fish food cost the most?
B. What fish food makes fish grow faster?
C. Does aquarium size affect growth rate of fish?
D. What type of fish food do fish like the best?
Once identified the controlled, the independent, and the dependent variables, we can say the question is C. Does aquarium size affect the growth rate of fish?
What is the independent variable?
Refers to all the variables in an experiment that provoke a response in another variable.
An independent variable is the one that changes or is controlled and modified in the experiment to analyze how another variable responds to it.
It changes to analyze its effects on the dependent variable.
What is the dependent variable?Refers to the variable whose response depends on any change in the independent variable. Depending on how the independent variable is modified, the dependent variable changes.
What is the controlled variable?During an experiment, the controlled variables are kept constant. Unlike the independent variable, the controlled variables do not influence the results. These variables do not affect the response of the dependent variable.
In the exposed example,
the independent variable ⇒ Aquarium size ⇒ 1 cubic foot and 10 cubic feetthe controlled variable ⇒ food and vitaminsthe dependent variable ⇒ fishes growth.The question that Jake is asking in his experiment is Does aquarium size affect growth rate of fish? Option C.
Since he only needs to know how the size of the aquarium affects the animal's growth, he needs to keep constant other influencing variables such as food and vitamins. Otherwise, these other variables might also influence the results.
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Why is sunlight important to all aquatic ecosystems?
Pick a answer
---------------------
A. Sunlight allows fish to see their surroundings, even at depth.
B. All of the other answer choices
C. Aquatic producers need sunlight to make food and release oxygen.
D. Aquatic organisms cannot carry out life processes in the dark.
Answer:
Sunlight stimulates the growth of phytoplanktons which belong to the first trophic level in an aquatic ecosystem pyramid. If these do not exist, aquatic ecosystem would also disappear.
Which is defined as a cell structure made of DNA that gives all of the master instructions for the cell?
The Nucleus is the cell structure that contains chromosomes which hold the genetic information of the individual.
What do you mean by DNA?DNA stands for Deoxyribonucleic acid. It is one of the most common types of genetic material in most organisms. It is found in both forms single-stranded or double-stranded.
Chromosomes are made up of tightly coiled DNA and consist of proteins known as histone proteins and provide all the master instructions to the cells.
Therefore, the chromosome inside the nucleus is the cell structure made of DNA that gives all of the master instructions for the cell.
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Which of the following correctly describes Photosynthesis?
Answer:
Photosynthesis is a plant that uses sunlight, water, and carbon dioxide to make sugar and oxygen.
The plants in this ecosystem are dark in color to absorb sunlight, covered in hair and grow in clumps. What type of ecosystem could a plant with these
adaptations be best fit for?
Darker colors absorb and retain warmth than warm tones. As a result, plants in the tundra have dark-colored leaves, hairy and clumped and stems to help them absorb solar heat faster and stay warm for longer periods of time. So it could be tundra ecosystem according to the given scenario.
What is tundra ecosystem?Tundra ecosystems are treeless areas found in the Arctic and on mountain peaks where the climate is cold and windy and rainfall is scarce.
Much of the year, tundra lands are covered in snow, but summer brings bursts of wildflowers.
Darker colors absorb and retain warmth than warm tones. As a result, plants in the tundra have dark-colored leaves, hairy and clumped and stems to help them absorb solar heat faster and stay warm for longer periods of time.
Thus, the correct ecosystem for the given condition is tundra.
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How does natural selection contribute to the theory of evolution?
Answer: Natural selection leads to evolution because the traits of those who are able to reproduce influence future generations genetics and gradually lead to these passed on traits becoming the normal state of being, thus causing the species in question to evolve.
Explanation:
What were the results of the experiment done by Dr. Tierno?
Answer:
There were many different microorganisms on the pillows. Dr. Tierno stated that these germs were probably causing the kids to have allergy symptoms.
I hope that answers your question
Life ORientation project 2021 task 2
A life orientation refers to a subject studied in Grade 7-9 of South-African Schools. The purpose is to give students in school orientation on how they ought to behave in life and society.
What are the topics in Life Orientation?Some of the topics you'd typically find in Life Orientation are:
Goal settingHealth, social and environmental responsibilityconstitutional rights and duties etc.Learn more about the life orientation project at:
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A salmon is genetically modified in a laboratory by inserting one gene into one chromosome of a homologous pair. The salmon escapes, and breeds with a wild, unmodified salmon. Would you expect all of the offspring to be genetically modified? Explain your reasoning.
Answer:
no
Explanation:
only some of the genes would replicate into the offspring. genes from the modified salmon would mix with the genes of the non modified salmon
Choose the molecule that is most concentrated at each ph ?
2. A car salesperson claims that a 300-hp engine is a necessary option in a compact car, in place of the conventioNl 130-hp engine. Suppose you intend to drive the car within speed limits (# 65 mi/h) on flat terrain.
How would you counter this sales pitch?
Hi there !
Why is biodiversity important ?
Thank you
Answer:
Biodiversity is necessary for all species on Earth, including humans, to function properly. We cannot have healthy ecosystems that give us with the air we breathe and the food we consume without a vast range of animals, plants, and microorganisms.
Explanation:
Answer:
Biodiversity is essential for the processes that support all life on Earth, including humans.
Explanation:
Marcie feeds her dog 98 ounces of dog food each week. She has 6 pounds of dog food.
Does she have enough dog food to feed the dog for a week? How many ounces of dog food does she have?
Answer:
She does not have enough for a week. Marcie has 96 ounces.
Explanation:
6 pounds is 96 ounces. Since she needs 98 ounces, she does not have enough for a week.
name the nucleus of the thalamus for conscious sensation
Explanation:
Relaying limbic sensory and motor signals to the cerebral cortex, Regulating consciousness,sleep, alertnessis water capable of chemical weathering
?
Answer:
no no no no no no no no no no no no
Which is an example of kinetic energy?
Answer:
Running
Explanation:
Running is kinetic energy because you are using force to run and running is an action.
Hope It Helps
what type of material is the cell membrane made of
Answer:
They contain a variety of biological molecules, notably lipids and proteins.
Explanation:
What are the differences between a roundworm and annelid?
Answer:
Annelids are segmented worms whereas roundworms are not segmented. Further, annelids have a true coelom while roundworms have a pseudocoelom. This means annelids have a well-developed mesoderm while roundworms lack a mesoderm.
If the water temperatures increase in the estuary, oxygen levels would _____.
A: decrease
B: increase
C: stay the same
Describe the structure of the digestive system.
Answer:
[tex]\bold{Structure \: of \: digestive \: system}[/tex]
The digestive system is made up the GI tract or digestive tract and the liver, pancreas, and gallbladder.The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.The small intestine has three parts :The first part is called the duodenum. The jejunum is in the middle the ileum is at the end. The large intestine includes the appendix, cecum, colon, and rectum. The appendix is a finger-shaped pouch attached to the cecum. The cecum is the first part of the large intestine. The colon is next. The rectum is the end of the large intestine.Metals in streams and rivers cause a pH that is so low that they ____.
A: Cause plants to grow well
B: Easily support many types of aquatic life
C: Cannot support sensitive populations of aquatic organisms
D: Encourage nutrient uptake by living organisms
Answer: C
when the pH level is very low in streams and rivers, they are inhospitable for many organisms
Does Alaska have more native birds or reptiles?
3/ The trophic levels in ecosystem are labeled as A, B and C
3
Heat
Heat
B
A
Consumers
Sun
Producers
с
Decomposers
Inorganic
Nutrient
Pool
Heat
Which option is correct about the trophic levels?
A The Chas more energy available to it than the B. B. The C uses cellular respiration to obtain energy.
C. The A builds simple compounds from complex D. The B are the most essential components of the
units
ecosystem
Answer:
Explanation:
3/ The trophic levels in ecosystem are labeled as A, B and C
3
Heat
Heat
B
A
Consumers
Sun
Producers
с
Decomposers
Inorganic
Nutrient
Pool
Heat
Which option is correct about the trophic levels?
A The Chas more energy available to it than the B. B. The C uses cellular respiration to obtain energy.
C. The A builds simple compounds from complex D. The B are the most essential components of the
When should most agricultural crops be fertilized?
A In the spring
B. In the fall
C. In midsummer
D. Throughout the growing season
Answer:
A
Explanation:
in the spring
Fertilizer is most effective when used on plants at their peak growing cycle.
Help me plsssssssssssssssss
Answer:
Planet A is Venus
Planet B is Saturn
Explanation:
Planet A 0.72 AU which Mars and Uranus arent. Also Planet A doesnt have rings eliminating Saturn. This means that the answer for Planet A is Venus
(BTW, Planet B is Saturn, in case it asks you in a later question)
Hopefully this helped you!
the answer should be venus
Red apple weighs 245grams green one weighs 167grams which one more attracted to the earth
Answer:
the Red apple weighs is more than the green one soo,the Red apple is more attracted to the earth
Almost 225 soccer fields can fit in one square mile . Approximately how many could you have to yourself if you lived in a region containing 25 people per square mile ? Or 100 people per square mile ?
(a) The size of the soccer field you can have to yourself if you leave in a region containing 25 people per square mile is 9 fields.
(b) (a) The size of the soccer field you can have to yourself if you leave in a region containing 100 people per square mile is 2.25 fields.
Size of soccer field to yourself
The size of the soccer field you can have to yourself if you leave in the given regions is calculated as follows;
For 25 people per square mileSize per person = (225 field/mi²) / (25 persons/mi²)
Size per person = 9 field per person
For 100 people per square mileSize per person = (225)/100
Size per person = 2.25 field per person
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Which statements describe situations where organisms interact and depend on each other for survival?
Choose all correct answers.
1. Tree frogs use plants as protection from predators. The plants receive nothing from the tree frogs.
2. Zebras eat grass, Zebras spread the grass seeds to new locations in their droppings as they move with their herd.
3. Birds find shelter in trees as they build their nests and raise their young. Birds also eat the fruit on trees and then spread the seeds to new places in their droppings.
4. The oxpecker feeds on the insects that surround the rhinoceros, The rhinoceros has fewer bugs surrounding it.
Answer:
Predation is an interaction in which one organism, the predator, eats all or part of the body of another organism, the prey.
Herbivory is a form of predation in which the prey organism is a plant.
Predator and prey populations affect each other's dynamics. The sizes of predator and prey populations often go up and down in linked cycles.
Predators and prey often have adaptations—beneficial features arising by natural selection—that are related to their interaction. For prey, these include various defenses and warning signals, such as bright coloration.
Explanation:
Rainbow trout live in the rivers and streams of upstate New York. Rivers in this area are cold and have strong currents. If temperatures fall over time because of climate change, what is one variation that would likely help the trout to survive? Why? Write 1-2 sentences.(2 points)
Tolerance towards cold temperature and adaptabilities are the variation that help the trout fish to survive.
Which factor help the trout to survive?If temperatures fall over time because of climate change, the tolerance towards cold temperature is the one variation that would likely help the trout to survive because only those organisms survive in cold temperature that have good tolerance and various adaptation towards cold temperature.
So we can conclude that tolerance towards cold temperature and adaptabilities are the variation that help the trout fish to survive.
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what is a factor that affects soil development.
a. Time
b. Slope
c. Type of rock
d. all of the above
Please select the best answer from the choices provided
Answer:
D) All of The Above
Explanation:
depending on what type of soil, it could take longer or shorter for it to develop properly. The slope can cause certain parts to develop better than. others as well.
hope that helps