What is defined as the variable in a controlled experiment that is purposely changed or manipulated? PLEASE HELP!!

constant
independent variable
controlled variable
dependent variable

Answers

Answer 1

Answer:

Independent Variable

Explanation:


Related Questions

increasing intracellular cAMP leads to smooth muscle relaxation by: Group of answer choices inhibiting IP3 channels, leading to decreased Ca2 in the sarcoplasm and reduced contraction. Increasing the relative activity of MLCP, leading to a decrease in tension. Activating K channels, increasing K leaking out of the cell which hyperpolarizes it and decreases the likelihood of Ca2 entry. Lower levels of MLCK activity, leading to decreased contraction.

Answers

Answer:

1. Inhibiting IP3 channels, leading to decreased Ca2 in the sarcoplasm and reduced contraction.  

2. Increasing the relative activity of MLCP, leading to a decrease in tension.

3. Activating K channels, increasing K leaking out of the cell which hyperpolarizes it and decreases the likelihood of Ca2 entry.

Explanation

In smooth muscle, cyclic AMP (cAMP) mediates relaxation because cAMP inhibits a specific kinase required for myosin light chain protein (MLCP) phosphorylation, thereby triggering contraction in the smooth muscles. It has been shown that cAMP inhibits 1,4,5-trisphosphate (IP3)-dependent calcium ions (Ca 2+) release by activation of the cGMP-dependent protein kinase (PKG). PKG proteins act to modulate Ca2+ oscillations by stimulating sarcoplasmic Ca2+-ATPase membrane proteins, increasing Ca2+ in the sarcoplasmic reticulum stores and Ca2+ efflux from the cells, and activate voltage-gated potassium (K) channels, thereby leading to membrane hyperpolarization and reducing Ca2+ entry through Ca2+ channels.

What if cellular respiration did not occur

Answers

Answer:

cellular respiration is a process that needs oxygen, so when oxygen is not present, they do not happen, but there is glycolysis, which doesn't need oxygen. the process of glycolysis produces 2 ATP and that is what is needed, so to continue glycolysis, the cells go through fermentation.  

Explanation:

THE ANSWER IS FERMENTATION!!!!

Answer:

If cellular respiration does not occur, then the level of oxygen present in the cell will get decreased as a result cell can die due to lack of oxygen. This is because cellular respiration provides the energy necessary for cellular activities.

Explanation:

When writing the name of an organism which part starts with a capitol letter?

A. Kingdom
B.genus
C.species

Answers

Answer:

I believe it is Genus, but I'm not sure.

Explanation:

The answer is B. Genus

How many kingdoms are there in the classification system?

3
4
5
6

Answers

There are 6 kingdoms in the classification system

Answer:

5/6

Explanation:

The five are Monera, Protista, Fungi, Plantae, and Animalia

There are six if you include archaebacteria and eubacteria

It depends which one you learned honestly

List and explain the characteristics of living things

Answers

Answer:

Life process

Movement

Respiration

Sensitivity

Growth

Reproduction

reason:

Life process

Explanation

Earthworms

Movement

All living things move in some way. This may be obvious, such as animals that are able to walk, or less obvious, such as plants that have parts that move to track the movement of the sun.

Earthworms use circular and longitudinal muscles to move through soil or along surfaces.

Respiration

Respiration is a chemical reaction that happens within cells to release energy from food.

The food that earthworms eat supplies their body with energy-rich molecules such as glucose. On entering the cells of their body, these molecules are broken down in a series of steps to release energy to be used by the body, producing carbon dioxide and water as waste products.

Sensitivity

The ability to detect changes in the surrounding environment.

Earthworms have light-sensitive cells scattered in their outer skin. Their skin cells are also sensitive to touch and chemicals.

Growth

All living things grow.

Earthworms hatch from eggs and can grow up to a metre or more in length! Some earthworms are also able to regrow small parts of their body that have been lost or injured.

Reproduction

The ability to reproduce and pass genetic information onto their offspring.

Earthworms have both sperm and eggs within their bodies (they are hermaphrodites) but they cannot self-fertilise and need to mate with another individual. After mating, a cocoon containing the fertilised eggs is deposited in the soil.

Excretion

Getting rid of waste.

Earthworms excrete waste from their anus – the last segment of their body.

Nutrition

The intake and use of nutrients. This occurs in very different ways in different kinds of living things.

Earthworm nutrition comes from a variety of sources, depending on their species. Food types include manure, compost, plant material, fungi, microorganisms and decaying animals. They take in food through their mouths.

Which of the following describes a lysosome

Answers

A tiny, membranous sac that contains enzymes that degrade worn cell parts and debris. ... the cell will swell and may eventually burst.

Help me plz on my biology

Answers

Answer:

no problem is the first time since I am now in number of people who are you doing today is a day off

2. How does a generator create current?

Answers

It is important to understand that a generator does not actually 'create' electrical energy. ... This movement creates a voltage difference between the two ends of the wire or electrical conductor, which in turn causes the electric charges to flow, thus generating electric current.

like animals plants need continuously reproduce themselves?​

Answers

Explanation:

Plant reproduction is important to people and animals also because if plants were not continuing to make more of themselves then there would not any plants for people and animals to eat. ... Plants and animals and plants and pollinators are interdependent because they all need each other to survive.

Answer:

like animals plants reproduce by there parent plant from seeds there is three ways plants reproduce from wind, water and animal

animals: animal like monkey eat the fruit of the plant and throw the seed away  later it will start growing

wind: when a strong winds occur it will carry plants like dandelions, swan plants away from its parents and when the wind is over it will start growing

water: plants like coconut will fall on the sea and plot away from its parent and after it landed on land it will start growing

Explanation:

hope it helps can you mark me as the brainliest have a nice day :)

Inorganic, crystalline substances found naturally within earth are known as

Answers

Answer:

Minerals.

Explanation:

Minerals can be defined as any form of naturally occurring, inorganic solid substance characterized by a crystal structure. Also, minerals are homogeneous in nature with a defined chemical composition and characterized by a crystal structure comprising of ions, atoms, or molecules in an orderly arrangement.

Generally, molecules attach on the inside of a mineral to give it shape. Therefore, the molecule of a mineral is a crystal three-dimensional regular structure (arrangement) of chemical particles that are bonded together and determines its shape.

Due to the fact that these molecules are structurally arranged or ordered and are repeated by different symmetrical and translational operations they determine the shape of minerals.

Hence, inorganic, crystalline substances found naturally within earth are known as minerals. Some examples of minerals are iron, copper, aluminum, tin, coal, quartz, feldspar, mica, etc.

What is the net force? Is it at rest or is it in motion?

ON, and in motion
13N and in motion
0N and at rest
13N and at rest

Answers


I know that’s it’s 0N for sure. But I’m not sure about the motion and rest part. I think it’ll continue moving though so most probably in motion

Answer

0N and at rest :)

Explanation:

7N+6N=13N

10N+3N=13N

Which of the following is not a way humans affect the Carbon Cycle?

a
Volcanic eruption which spew tons of carbon dioxide and other carbon rich gases into the air.
b
Conversion of forest and ecosystems into cities and other areas.
c
Burning of fossil fuels through transportation and industry.
d
Increase in farming and ranching of animals, which changes land use and produces Carbon rich gases.

Answers

Answer:

D or B

Explanation:

I think this is correct

hope this helps :)


You have a strand of DNA with 5 nucleotides on each side for a total of 10 nucleotides. 4 of the nucleotides are adenine.

pls help

Answers

Answer:

According to Chargaff’s rule, the amount of adenine is always equal to that of thymine and the amount of guanine is always equal to that of cytosine. A = T(120), G = C(120) The total number of nucleotides would be 120 × 4 = 480.

Your teacher gives you a task in science class. You must decide which of the five samples you are given are alive or were once alive. One specimen is a crust gray-green object. What is the BEST clue you could use to decide: living thing or not a living thing.

A) Does it move?
B) Does it have DNA?
C) Is it made of cells?
D) Can it make its own food?

Answers

The best clue that can be used to decide living thing or not a living thing is the observation of living or dead cells present in the specimen. All the living or dead organisms exhibit cells. Cell is a structural and functional unit of life. The growth and metabolism of living organism are dependent upon a cell. A cell in a life form exhibit organelles and components which are not found in non-living objects

The BEST clue you could use to decide: living thing or not a living thing- is option C. is it made of cells and

The living things have some basic characteristic features of life in them that help in determining if an object or thing is living or nonliving thing. these characteristic can be present in all or some, are as follows:

Cellular organization - made of cell is very basic trait of life of every living being.the ability to reproduce - it is present in almost every living thing it could be sexual or asexual.growth & development - living things grow and developenergy use - use energy to perform various functionshomeostasis - regulate according the environmentGenetic material : it can have DNA as genetic material

thus, there is two options only that present in every living organism that are made of cells and presence of DNA, but for DNA one need to investigate thoroughly so the correct answer is - C) Is it made of cells?

Learn more about characteristic of life:

https://brainly.com/question/16872273

Particles too large to enter the membrane need to use a transport-channel proteins, no energy is required and they move from high to low concetration.
A-Ion Pump
B-Facilitated Diffusion
C-Simple Diffusion
D-Osmosis
and it is not C because that’s what i picked

Answers

Answer:

B

Explanation:

Facilitated diffusion because the transport channel proteins facilitate(help) the particle to enter the cell

answer the correct answers to this assignment.

Answers

First one is 100% HH
first one 100%. second is 75%. third is 25%. fourth 25% and i think fifth is 25% as well


If a koala bear has sixteen pairs of chromosomes, what are the possible
combinations of genes that will be represented?

Answers

Answer:

Explanation:

All vombatid species have 2n = 14 chromosomes; the koala has 2n = 16, which G-banding studies suggest is derivable from a wombat-like karyotype by means of a simple centric fission in the equivalent of the submetacentric wombat second autosomal element


What structure has become useless through evolution but still exists,
typically in a much reduced form?

Answers

Answer:

A "vestigial structure" or "vestigial organ" is an anatomical feature or behavior that no longer seems to have a purpose in the current form of an organism of the given species. Often, these vestigial structures were organs that performed some important functions in the organism at one point in the past.

Explanation:

Low-carbohydrate diets became popular in the late 1990s and were quickly proclaimed to be a fast and easy method of weight loss. The effectiveness and safety of these diets are dependent on the activity and overall health of the individual as well as the total nutritional content of the diet. However, it is true that in some cases, these diets have been effective. What metabolic effects caused by eating a low-carbohydrate diet can be linked directly to a decrease in fatty acid synthesis and an increase in fatty acid oxidation?

a. release of insulin from pancreatic's cells
b. dephosphorylation of AMPK
c. release of glucagon from pancreatic's cells
d. phosphorylation of AMPK

Answers

Answer:

c. release of glucagon from pancreatic's cells

d. phosphorylation of AMPK

Explanation:

Low-carbohydrate diets (LCDs) stimulate the secretion of glucagon by a decrease in the blood glucose concentration. Glucagon is a key hormone secreted by pancreatic cells in the same way as insulin but in an opposite way. This hormone (glucagon) prevents glucose accumulation as hepatic glycogen, while insulin helps to the accumulation of glucose in the liver as glycogen, thereby acting to reduce hepatic glucose output. Moreover, the AMP-activated protein kinase (AMPK) is a kinase protein that mediates the phosphorylation and inhibition of acetyl-CoA carboxylase (ACC) in order to reduce the synthesis of malonyl-CoA, a key molecule that regulates myocardial fatty acid oxidation.

Question 7 of 10
Our ability to be conscious of some aspects of our environment while
ignoring others is called:
A. the conscious mind.
B. the two-track mind.
C. selective attention.
O D. preconscious attention.
SUBMIT

Answers

I believe the correct option is C. Selective attention

Selective attention is our ability to be conscious of some aspects of our environment while ignoring others. Therefore, the correct statement is option C.

What is selective attention?

Selective attention is the ability of our mind to be conscious of some aspects while ignoring others. In selective attention, our mind focuses on a certain aspect of the environment and filters out the rest of the aspects. Selective attention is useful as it allows one to focus only on the useful information and responds to an important stimulus in an environment.

Selective attention can be affected by various factors such as our dedication to particular interests and goals. For example, while we are driving in heavy traffic, we will only focus on the potential hazards and ignores all the other information, such as education, career, etc.

Selective attention involves top-down and bottom-up processing. Top-down processing involves the use of information, such as knowledge, goals, etc. to retain our attention, while bottom-up processing involves the use of sensory information to capture our attention.

Therefore, selective attention is our ability to focus on only certain aspects of the environment.

Learn more about selective attention here:

https://brainly.com/question/30044882

#SPJ5

What is NOT apart of a seed?

Answers

Answer:

A) Stigma

Explanation:

This option makes the most sense of all of them. The food storage option is incorrect because food storage is a part of a seed. The stigma is part of producing the seed, not part of the actual seed. The testa is the seed coat (part of a seed). The plumule is also part of a seed (stem or seedling).

Hope it helps!

Describe how knowing the column (group) number is a "cheat code" for determining the number and types of bonds that an element can form.

Answers

Answer and Explanation:

The columns of the periodic table are able to inform the number and type of connection that the elements can make. This is because the number of each column informs the number of electrons in the valence layer of the elements. The amount of electrons in the valence layer is what determines the amount and type of bond that the elements make. The elements in column 1, for example, have 1 electron in the valence layer and therefore will make 1 covalent bond. The elements of columns 15, as another example, have 5 electrons in the valence layer and will need to make 3 ionic or covalent bonds.

To describe how knowing the group number is a cheat code to determine the type of bonds that can be formed, we should first define periodic table

What is periodic table

Periodic Table is a series of elements in which they are arranged in increasing order of their atomic number from left to right but the table also have groups (column) from up to downwards each group have atoms with same number of electrons in their last shell due to which they all have almost similar properties such as same magnetic properties ,same number of bonds formation, metallic character .

We can say that similarity in properties of members of same group is due to same number of valance electrons . For example group 14 i.e. Carbon Family ,all elements of this group will have 4 valance electrons and will form 4 bonds by sharing of their electrons.

For more information on periodic table, visit

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The diagram below represents a planet revolving in an elliptical orbit around a star.
Star
Planet →
As the planet makes one complete revolution around the star, starting at the position shown, the gravitational attraction between the star and the planet will:
O Decrease, then increase.
o Increase, then decrease.
Continually decrease
Remain the same

Answers

A planet: planet makes one complete revolution around the star

What have been some contributing factors that have led to increasing temperatures on earth?

Answers

Answer:

im sorry bir şey yok khunub

Answer: Here-

Explanation:

Since the Industrial Revolution began around 1750, human activities have contributed substantially to climate change by adding CO2 and other heat-trapping gases to the atmosphere. These greenhouse gas emissions have

Your mother asked you to put water soluble fertilizer around the roots of her prize winning rose bush. The following week, you noticed the leaves of her rose bush are beginning to turn yellow and wilt. In terms of tonicity and water movement, explain why the rose began to die after the addition of fertilizer. Bonus: What can you do to solve this problem

Answers

Answer/Explanation:

The water soluble fertilizer that was added created a hypertonic environment. Concentration of solute is higher around the plant cells thereby leading to the movement of water molecule away from the cells of the rose bush. This is why the rise bush began to wilt as the leaves turn yellow.

Solution:

Give the plants a reasonable amount of water to cause the solution to be isotonic. When the amount of fertilizer and water is relatively balanced, the plants would be able to utilize the fertilizer, feed well and grow well.

Based on the table above, which star can you predict would most likely appear blue?
Sun
Canopus
10 Lacertae
Betelgeuse
Fast plzzzzz

Answers

Answer:

10 Lacertae

Explanation:

There are Blue stars, these are the most luminous and the biggest and hottest. Ranging from above 10000 degrees Celsius to several thousand Celsius.

I think the answer should be 10 lacertae , I recently show this question somewhere and this was the answer , I hope this was helpful

jellyfish is considered as the deadliest marine animal in the world. how it causes fatal to human?​

Answers

Answer:

i got stung by a jellyfish :( anyways lol heres why they are fatal to humans

Explanation:

Their venom is considered to be among the most deadly in the world, containing toxins that attack the heart, nervous system, and skin cells. It is so overpoweringly painful, human victims have been known to go into shock and drown or die of heart failure before even reaching shore.

A biologist studies a population of anteaters living in a large nature reserve. The reserve is surrounded by farms where anteaters are not safe, but the reserve is a perfect place for anteaters: there are few predators and lots of ants. The biologist counts the number of anteaters in the reserve every year for twenty years and finds the size of the population does not change much. Which of the following is the best description of what life in this reserve is probably like for these anteaters?a. The anteaters have little or no difficulties obtaining food and raising offspring. ants. Their tongues are 24 inches long and covered with sticky saliva. Anteaters cannot open b. Adult anteaters compete for food and many young anteaters die. theirmouth, and do not have teeth. Even the stomachs of anteaters are unique: unlike most mammals,c. It is impossible to know without actually observing anteaters in the reserve.

Answers

Answer:

Adult anteaters compete for food and many young anteaters die

Explanation:

As there are not many predators and the number of ants is abundant, the population of anteaters should grow on a large scale, however, this is not what happens, since the size of the population is the same for twenty years. This shows that the anteater population itself is regulating the size of the population through internal disputes, where anteaters, due to the high birth rate, end up competing for food and shelter, causing the most young and inexperienced individuals to be killed.

How much physical activity is recommended to prevent heart disease

Answers

Explanation:

moderate and low impact exercise can be beneficial for acid reflux problems. activities like walking, light jogging, yoga, riding a stationary bike, or swimming are good choixes! it can help you lose weight which will alleviate symptoms. my family has a really bad history of heartburn and we like to prevent it through dancing or yoga! (:

Which of the following is a true statement about cellular respiration? (4 points)

Cellular respiration occurs only in plant cells.
Cellular respiration occurs only in animal cells.
Cellular respiration occurs in both plant and animal cells.
Cellular respiration occurs in some plant cells and some animal cells.

Answers

Answer:

Cellular respiration occurs in both plant and animal cells.

Explanation:

Cellular respiration occurs in both plant and animal cells, and is an essential process that organisms need to survive.

Cellular respiration is the main way that organisms create energy from the food that they eat.

It occurs in both plant and animal cells because both plants and animals need a way to convert their food into energy forms, such as ATP.

So, the correct answer is that cellular respiration occurs in both plant and animal cells.

Answer:

D

Explanation:

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