A student-designed an experiment to test the hypothesis given below.
Hypothesis: The number of mitochondria in the muscle cells of girls increases with age.
What is the best independent variable for this experiment?
number of mitochondria
number of muscle cells
gender of the subjects
age of the girls

Answers

Answer 1

Answer:

B) number of muscle cells ❤️


Related Questions

it’s true or false! please help

Answers

Answer:

This is true

Explanation:

This is true because in the video it states the facts that help understand its true, HOPE THIS HELPS

Yes this is true. The answer is true

how to get fake fever​

Answers

Answer:

warm anything till it's hot and put it on ur forhed I guess..

- make thermometer warmer (rubbing it between your fingers)
- eat something warm
- put something warm against your. forehead
- find a way to appear a bit sweaty
- fake symptoms such as: headache, low appetite, tiredness, feeling cold (don’t overdo it!!)

Question 1
Ozone prevents harmful X-rays from reaching earth.
( True or false )

Question 2
Ozone layers loss is caused by chlorofluorocarbons.
( true or false)

Answers

Answer:

answers are:

ANSWER 1. TRUEANSWER 2. FALSE

PLS FOLLOW ME.....

AND ALSO MARK AS BRAINLIST

What is the first amino acid in your protein

Answers

Answer:

Methionine

Explanation:

Methionine is specified by the codon AUG, which is also known as the start codon. Consequently, methionine is the first amino acid to dock in the ribosome during the synthesis of proteins.

Answer:

The first amino acid put into proteins is methionine.

Need now

Imagine you are a population ecologist who is starting a campaign to control invasive species in your community. Write 3-5 sentences about what you would tell members of your community who come to a meeting to learn about invasive species.

Answers

Answer:

This is what I would say:

Hello, today I will talk to you about invasive species and why they should be stopped, invasive species are bad for the environment because they destroy other creatures, like if the native species think that it's prey and decide to eat it; it might harm them. For example, if there were trees in a certain environment and an invasive species came along every creature would get hurt because those trees are very tall and they stop sunlight from reaching the ground so that would help to stop invasive plants from growing but if an invasive species of beetles came along they would eat the trees and kill them making sunlight reach the ground. Then it would help the invasive plants to grow, and what would the invasive species of plants do you ask? They would harm the creatures because there are herbivores and they eat plants and since they might think that the plant is toxic because they look like a toxic plant in that environment they will starve and die. Little by little the animals would get harmed because predators eat the herbivores and if there's no food for them they will die, so you see a lot of creatures would get harmed if we don't stop invasive species.

P.S. maybe you should change the words a little because I used this in previous work.

What are 2 differences and similarities between these two processes?

Answers

Answer:

The two processes are similar in that they both produce energy, albeit in two different forms. They are different in that photosynthesis assembles the glucose molecule, while cellular respiration takes it apart.Photosynthesis produces the oxygen to replenish oxygen that is used up by living organisms during respiration. Carbon dioxide produced during respiration is one of the reactants plants need to perform photosynthesis. Photosynthesis and cellular respiration are both part of a mutually beneficial relationship.Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide.

Explanation:

The principal difference, however, between photosynthesis and respiration is that photosynthesis utilizes carbon dioxide and water in the presence of light to produce glucose and oxygen, whereas respiration uses oxygen and glucose to power the activities of the cell.Both processes need carbon dioxide to produce the carbohydrates. Both processes also need an energy source to fuel the reactions. And, most important, both photosynthesis and chemosynthesis result in food for the organisms, which in turn becomes food for other organisms, supporting the circle of life.Photosynthesis and respiration are reactions that complement each other in the environment. They are in reality the same reactions but occurring in reverse. While in photosynthesis carbon dioxide and water yield glucose and oxygen, through the respiration process glucose and oxygen yield carbon dioxide and water.

Which biome receives 200 to 400 cm of rain per year?
o deciduous forest
O temperate rain forest
taiga
grassland

Answers

Answer:

The correct answer would be - temperate rainforest.

Explanation:

The temperate rain forest is the annual is receives 200 cm to 400 cm per year. The annual precipitation is also up to 200 cm annually in this biome. It is coniferous and broadleaves are found.

The temperate rainforest is the biome that gets dense humidity and higher rainfall per year and the trees shed their old leaves every year and new leaves are found each year. The climate is usually mild and neither cold nor hot.

what some limitations found in photosynthesis experiment with the use of dicotyledous leaf ?​

Answers

Answer:

The history of net photosynthesis and transpiration per unit leaf area was determined for intact soybean leaves from their unfolding to senescence during flowering and pod filling on untreated (podded) and partially depodded plants growing in a glasshouse. Leaf diffusive resistances to CO2 were calculated and a water use efficiency parameter was derived (net mass of carbon dioxide fixed per unit mass of water transpired per millibar vapour pressure deficit). Net photosynthesis and transpiration behaved similarly through all stages of leaf development. A number of peaks were evident in these parameters. The first was associated with leaf expansion and occurred when the leaf reached its maximum area. The second peak coincided with flowering of the plant and later peaks occurred during pod filling. Stomatal and mesophyll resistances also exhibited similar behaviour during the life of the leaf; the possible causes of this linkage are discussed. Water use efficiency increased rapidly up to the time of full lamina expansion. Thereafter, it rose slowly or remained stable until leaf senescence approached, when the efficiency declined. Net photosynthesis and transpiration of leaves were very similar in both podded and partially depodded plants. It appears that to prevent a shortage of assimilate during flowering and pod filling, photosynthesis may be maintained or increased in some leaves and the response is not related to the number of pods available for filling. The increases in photosynthesis were correlated with both higher stomatal and mesophyll conductances. Mechanisms by which the plant may control leaf photosynthesis are discussed.

Demonstration of Learning:

1. What is the main difference between a prokaryotic cell and a eukaryotic cell?

A – Prokaryotic cells have a nucleus while Eukaryotic cells do not.

B – Eukaryotic cells have a nucleus while Prokaryotic cells do not.

C – Both have a nucleus.

D – Both do not have a nucleus.


2. The “nucleus” of a cell is kind of like a –

A – Stomach

B – Eye

C – Brain

D – Heart


3. Plants and Animal cells are both ____________ while Bacteria cells are ______________.

A – Eukaryotes, Eukaryotes

B – Prokaryotes, Prokaryotes

C – Prokaryotes, Eukaryotes

D – Eukaryotes, Prokaryotes

Answers

Answer:

1- B eukaryotic cells have a nucleus while prokaryotic don't

2- C

3- D

Based on solute concentrations, do you expect the cell to
swell or shrink?

Answers

Answer:

The cell will swell and burst because, when the cell is swelling it wont have an effecton the solute concentration outside the cell.

What is the solution and concentration?

What's the answer pleaseee??!!!

Answers

Answer:

the first one

Explanation:

So the predicted offspring genotypes are 50% Hh and 50% hh

so there is a 50% chance that they will have no horns and and aa 50% chance that they wont

Adenine, Guanine, Thymine and Cytosine are 4 nitrogenous bases that belong to
DNA
RNA
none of the above

Answers

Answer:

DNA

Explanation:

Adenine, Guanine, uracil and cytosine belong to RNA

During protein synthesis, is DNA replication needed to start the transcription process? I always see these two processes together but I don't see how DNA replication is needed here. Thank you.

Answers

in protein sysnthesis, DNA is needed but not the replication of it. The DNA is used as a template for the mRNA (which will leave the nucleus and code for the protines). DNA replication is needed to conserve the genes but it isn't necessarily needed in protien synthesis

if this didn't make sense then i can elaborate on it :)

1. How are organic molecules related to all living things?

Answers

Answer:

Explanation:

Organic molecules are the molecules which exist in all living things. They are life's building blocks. All things are formed from these organic molecules.

Is photosynthesis only found in plants?

Answers

Answer: no

Explanation: its in all green plants like grass leaves and any plant or food

the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct. hope it helps ФωФ

Suppose you are on a ship near the equator in the Atlantic ocean you notice that the barometric (air ) pressure is dropping what type of weather might you soon experience

Answers

Answer: You might experience cold/winter weather because

Explanation: Atlantic ocean is pretty cold and as cold air rise up in the air making the atmospher kinda cold even when its near the equator.... because you are on a ship and you will only feel cold weather.

HELP ASAP 10 pts per person, plz back up your answers with reasons

The table below compares the distances between two bodies.


Comparison of Distance
Bodies Distance
X and Y 30.2 AU
Y and Z 7.2 light years


Based on the table, which of the following statements could be true?
X and Y are both within the solar system.
Y and Z are both within the solar system.
X and Y are farther apart than Y and Z.
Y and Z are both present on Earth.

I think it is A.

Answers

Answer:

nope c

Explanation:

INCOMING MESSAGE
There is a sex-linked recessive trait in our world
that malce skin blue instead of green. It is found on
14 Days x to
child, but we're trying to determine the probability
of having a boy with green skin with Briyah versus any
child with blue skin with Amalena.
BRIYAH
LVI89
PUR: 77%
GRELAF
ELV62
AMALENA

Answers

Answer:

What ?

Explanation:

Plz answer I will mark u as brainly. Carla drew a diagram to compare the roles of oxygen and hydrogen in photosynthesis. Which label belongs in the area marked Y? Enters plant as a part of water Combines with carbon dioxide Is released into air through stomata Is stored in leaves for later use

Answers

Answer:

Option A, Enters plant as part of water

Explanation:

In the process of photosynthesis, water molecule is broken down into oxygen and hydrogen through photolysis.

Once the molecule is broken down , oxygen is  released and hydrogen ion are used for initiating the further reactions in photosynthesis.

The following reaction occurs in photolysis-

2H2O -----> 4H+ + O2

Water is the most suitable subset among all.

Hence, option A is correct

Answer:

Not sure, but a good chance that it is released into air through stomata

Explanation:

You need to add a picture or something to make it clearer.

6. Scientists have genetically engineered bacteria to feed exclusively on petroleum products. How
can this technology benefit the environment?
A It can increase the amount of fossil fuels available for energy production
B. It can reduce the amount of harmful gasses in the atmosphere.
C. It can decrease the dependence on petroleum products for energy
D. It can reduce the effects of petroleum spills in sources of water.
B

Answers

a is the answer to ur question

Rain washing oily runoff from a road into a river that runs alongside the road is an example of point source pollution or nonpoint source pollution?

Help pls.

Answers

Answer:

This would be an example of nonpoint source pollution.

Explanation:

The source of point source pollution is typically factories and powerplants, leading to more air and water transferred pollutants and becoming easier to track. Nonpoint source pollution is the opposite of point-source pollution, with pollutants being released in a wide area. Since the rainwater would be washing the oils and particles into the water, it would be considered runoff. Runoff is one of the leading causes of point source pollution. I hope this helps. ^_^

Why is the enzyme added during manufacture of fruit juices

Answers

Answer:

its called the enzyme pectinase

Explanation:

it speeds up up the breakdown of pectin in fruits producing more juices

site of photosyntesis?​

Answers

Answer:

chloroplasts

Explanation:

do you need definition also

Answer:

chloroplast are the sites of photosynthesis of plants.

the hair of sheep is sheared and processed into _____
correct answer will be marked as branliest​

Answers

Answer:

Wool

Explanation:

"The hair of sheep is sheared and processed into wool."

Into Woolen Fibres

Woollen fibres are then  processed to obtained wool yarn.

Describe the path an egg from the ovary to the outside of the female body

Answers

The ovaries produce the egg cells, called the ova or oocytes. The oocytes are then transported to the fallopian tube where fertilization by a sperm may occur. The fertilized egg then moves to the uterus, where the uterine lining has thickened in response to the normal hormones of the reproductive cycle.

The chemical structure below represents a .......


carbohydrate
nucleic acid
lipid
protein

Answers

The answer is Carbohydrate

Answer:

lipid

Explanation:

lipid is the answer

help pls i need this right now

Answers

Answer:

B: student B

C: He must have either the same mass or the gravity must be equal to [M(a)xG(a)]/M(b)= (25 x 10)/30=250/30=8.33

What are the importance of reproduction in organisms? Explain.​

Answers

Answer:

It prevents their species from going extinct.

Answer:

In order to survive, we need to reproduce.

Explanation:

If reproduction stops in (This is an example) fish, the fish population will decrease by a large margin. It will also mean that there will be no fish for us and the predators that hunt fish. Those predators' population will decrease as well since fish will decrease. That is why reproduction is a must.

In May 2018, the Kilauea volcano on Hawaii's Big Island began to erupt, spewing lava over part of the island.

Which event are Hawaiians most likely to observe first in the areas covered by lava?

A. Mosses will grow in thin, rocky soil.
B. Lichens will grow on the cooled lava.
C. Trees will grow in thick, rich soil.
D. Grasses will grow in soil with organic matter.

Answers

Primary succession occurs after the occurrence of a severe event that leaves nothing but rocky surfaces. Option B. Lichens will grow on the cooled lava.

What is succession?

The succession term refers to colonization and subsequent changes.

Colonization has been defined as the sequence of events that conduce to the establishment of individuals, populations, species, or bigger groups in areas where they were absent before.

Succession refers to changes produced in the composition and structure of communities after a perturbation. There are different grades of succession according to the perturbation intensity.

What is Primary succession?

In primary succession, the perturbation is so intense that it eliminates all the life forms in the area.

It is the sequence of species appearance in an exposed area that has not been influenced by any other species or community before.

In these cases, the rock gets exposed but it can not be colonized directly. The new area needs to suffer erosion and different chemical and physical processes that fragment, degrade and dissolve the rock to make colonization possible.

Primary succession occurs after severe events affecting a region, such as a retreating glacier, a volcanic activity, or an intense fire that leave nothing but the exposed rock.

After the disturbance, the order of the living beings establishment depends on the strategies of each of the species to survive.

First, pioneer species arrive. These are the first inhabitants, mostly lichens or plants with the capability of surviving in such an environment. Only a few pioneers can establish in the open space.

Pioneers modify the habitat. They make it more suitable for the posterior establishment of later species, converting rock into fertile soil. As conditions get better, new species arrive like grasses.

Grasses and pioneers keep modifying the ground and making it better with time.

Habitat modification keeps on going while new species establish. They produce shadows and alter the temperature, and humidity, fertilizing the soil.

Competition becomes more frequent between species. The first species are eventually eliminated by competition, while new species keep appearing and competing for resources.

This sequence continues until there is no more facilitation, and the communities reache a climax, becoming stable and lasting for hundreds of years until another disturbance occurs.

In the exposed example, the severe event affecting the Hawaii's Big Island was a volcanoe eruption.

The most likely event observed first in the areas covered by lava would be Lichens will grow on the cooled lava. Option B

You will learn more about primary succession at

https://brainly.com/question/26675203

#SPJ2

what stage of the cell cycle does the liver stay in most of the time

Answers

Answer:

G1 is typically the longest phase of the cell cycle. This can be explained by the fact that G1 follows cell division in mitosis; G1 represents the first chance for new cells have to grow. Cells usually remain in G1 for about 10 hours of the 24 total hours of the cell cycle.

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