What is a macromolecule? Question 6 options: a) a molecule that contains carbon b) a very large molecule c) a molecule that has two hydrogen atoms and one oxygen atom d) a molecule you can see with the naked eye

Answer:

lithosphere, atmosphere and hydrosphere.

Explanation:

Answer:

the hydrosphere

the atmosphere

the lithosphere

Explanation:

The hydrosphere is all waters on the Earth's surface, such as lakes and seas, and sometimes including water over the Earth's surface, such as clouds.

The atmosphere is the Earth's layer of gases, commonly known as air, that is retained by Earth's gravity.

The lithosphere is the rigid part of the earth, consisting of the crust and upper mantle.

Answer:

Es el agrandamiento de órganos, piel u otras partes del cuerpo, causado por la acumulación de líquidos en los tejidos. La presencia de líquido extra puede llevar a un aumento rápido de peso durante un período corto (de días a semanas).

Answer:

It separate the inner environment from the outer environment.

Explanation:

The design provides the separation of the inner environment from the outer environment which is responsible to control the outside factors which directly affects the results of the experiment. The design provides control environment which is required for the experiment. In this control environment, the environmental factors will not affect the results of the experiment.

Answer:

10%

Explanation:

there is a the rule that only 10% of the energy is transferred from one trophic level to the other.

this means that only 10% of the food an organism eats  is passed onto the next organism. eg only 10% of the energy in a plant is transferred to a rabbit that eats the plant. After that if  a wolf eats the rabbit only 10% of the energy of food will pass on to the wolf.

Answer:

A

Explanation:

Answer: 3:1

Explanation:

i got it right on the test

Answer:

See below

Explanation:

The correct statements can be two. Either:

1) The cell wall of plants is made up of cellulose

2) The cell wall of fungi is made up of chitin.

Answer:

chintin is the chemical components of the cell walls of fungi

When a volcano erupts, tiny particles from the geosphere are released into the air. So, the correct option is C.

A volcano is a geological formation on the surface of the Earth that develops as magma and volcanic ash build up. During an eruption, lava, ash, and gas can escape through a crater or vent that is generally shaped like a mountain.

Explosive or non-explosive eruptions can have a large negative impact on the environment, causing ash fall, landslides, and lava flows, among other things. Tiny geosphere-derived particles are discharged into the atmosphere during volcanic eruptions.

All areas of volcanism contain compound volcanoes, but these volcanic structures are most common at plate convergence zones, where one tectonic plate plunges beneath another towards the earth's mantle.

Therefore, the correct option is C.

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Answer:

Please find the detailed explanation below

Explanation:

A chromosome is thread-like material that carries the long strands of the genetic material (DNA), which in turn carries the gene. The chromosome is the found form of nuclear material in the nucleus.

Due to the long nature of the DNA molecule, they cannot fit into the cell. Hence, to ensure they fit, the cell wraps the DNA molecule around a set of protein called HISTONE proteins to form a NUCLEOSOME. Each nucleosome is made up of DNA coiled around a set of 8 proteins called HISTONE OCTAMER. The nucleosome structure becomes more compacted and further wound around the histone to form a CHROMATIN. This chromatin then undergoes condensation to form the visible CHROMOSOME structure.

Answer:

Hypothalamic-Pituitary-Gonadal Axis

GnRH produced by the hypothalamus stimulates the production of both LH and FSH. FSH functions by stimulating ovarian follicular development in females and regulating spermatogenesis in males. LH induces ovulation and corpus luteum formation in the ovaries.

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Answer:

D. 200%

Explanation:

While Americans constitute the 5% of the world population, they use around the 24% of the world's energy.

Then, if the 100% of the population were like the Americans, we have:

5%*x = 100%

x = 100%/5% = 20

the whole population is 20 times the population of the US, then the total energy used is 20 times the energy used in the US.

Then the energy that the 100% of the population would use is equal to:

20*24% = 480%

So we actually would need like 5 Earths.

The option is 200%

A newborn that is SGA would be at risk for suffering from Diabetes or Hypoglycemia (Option I).

Diabetes is a disease where the individual cannot control the levels of glucose in the blood.

A newborn that is Small for Gestational Age (SGA) shows an increased risk of suffering from Hypoglycemia due to the lack of control of glucose in blood.

In conclusion, A newborn that is SGA would be at risk for suffering Hypoglycemia (Option I).

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Answer:

C.Pharynx

Explanation:

Answer:

Concentration Gradient

Explanation:

This means that it will move from a region where it's in lower conc to a region of higher conc

Answer:

My answer is D.

Energy sources that can be used i. place of hydroelectric energy.

The best definition of alternative energy is energy that can be used in place of fossil fuels. The correct option is A.

Alternative energy is that energies are used in the place of the conventional form of energy. These energies are renewable and eco-friendly.

The burning of coal and fossil fuel produces lots of greenhouse gases, so the best alternative energy is the one that replaces it.

Thus, the correct option is A. Energy sources can be used in place of fossil fuels.

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Explanation:

A good surfactant is going to have a hydrophilic head and a long hydrophobic tail. As a result, a surfactant molecule contains both an insoluble water (or an oil-soluble component) and a water-soluble component. Surfactant molecules will migrate to the surface of the water, where the insoluble hydrophobic group may extend out of the bulk phase of the water, either into the air or, if the water is mixed with oil, into the oil Phase, while the water-soluble head group remains in the water phase. This alignment and aggregation of surfactant molecules at the surface is intended to alter the surface properties of water at the water / air or water / oil interface.

Answer:

for the continuation of species.. further it's as needy as a person take the meal

Explanation:

It's can be counted as a daily need of people as we take the meal

Answer:

Explanation:

The plants grown in my place are -  rice, groundnut, sugarcane, grapes, mulberry, castor, ragi etc.

Parts of it used as food

rice - seed

groundnut - seed

sugarcane - stem

grape - fruit

Mulberry - fruit

Castor - seed

ragi - filler millet

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Answer:

In the given case, for the researcher to succeed, there is a need to place the gene next to the promoter sequence, which gets expressed in the mammary cells. The sequences of DNA, which illustrate that where the transcription of a gene by the RNA polymerase initiates is known as the promoter. These sequences are generally situated at the 5 prime terminals of the initiation site of transcription or are situated directly upstream.

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Answer :

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Answer: If the pons of the brain is damaged , it may cause a major interruption, loss of muscle control and function except for the eye movement in the body.

Explanation: no wander

Answer:

Thymine

Explanation:

The question is not clear, so the clear question is as follows:

A cell has a 5 percent salt concentration. It is placed into a solution with a 0.5 percent salt concentration. What will happen to the cell?

Answer:

Cell will get swelled and burst

Explanation:

When a cell is placed in a solution with less concentration, then the solvent particles move from lower concentration to higher concentration through a semipermeable membrane and the process s called osmosis.

In this case also, the cell has higher concentration and the solution has less, so water will move into the animal cell, causing it to swell and burst after some time.

Hence, the correct asnwer is "Cell will get swelled and burst".

Answer:

Water will move into the cell, causing it to swell.

Explanation:

The cell has higher concentration of solute and a lower concentration of water than the solution it is placed in. This means that water will move into the cell, causing it to swell and ultimately burst.

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Answer:

A limiting factor is anything in an environment/ecosystem that limits a population's size. They can be anything from the amount of available food, shelter, and competition.

Answer:

option D is correct

Explanation:

Take the subducting plate out, Tectonic plate movement is aided by the weathering of continental crust.

The correct answer is D

Tectonic plates are huge pieces of the Earth's crust and upper mantle. Oceanic and continental crust both make up their structure. Earthquakes take place at mid-ocean ridges in addition to the main faults that define the borders of the plates.

Convection currents are created by the intense heat and pressure that exists within the earth. The tectonic plates that make it up the earth's crust shift as a result of these currents.

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Answer:

the answer is the last one, they are always unicellular

Explanation:

Answer:

3.natural gas

Explanation:

The question provided is not complete as it lacks the group of choices, however the group of choices are given as follows:

A. A contraction fails to occur because an action potential is not generated in the muscle cell.

B. A contraction fails to occur because this toxin directly prevents ion release from intracellular stores.

C. A contraction fails to occur because neurotransmitter release by the motor neuron is blocked at the neuromuscular junction.

D. A contraction fails to occur because this toxin prevents cross bridge formation and thereby directly prevents contraction.

E. C and D are both true

Answer:

The correct answer is option A : A contraction fails to occur because an action potential is not generated in the muscle cell.

Explanation:

A muscle contraction takes place when action potential bring to muscles by nerves, which is traveled with the help of motor neuron and imitated the muscle contraction.

Acetylcholine or Ach is a chemical messenger to bring the nerve impulses between a nerve and a muscle. If the receptor is block with applying toxin muscle will not contract as ACh will not be able to propagate the nerve impulse to the muscle so there will be no action potential.

The correct answer is option A : A contraction fails to occur because an action potential is not generated in the muscle cell.

Complete question:

You are tracking three loci in the fruit fly, loci A, B, and C, and want to know whether the loci are linked and if so what their physical distances are from one another as well as the physical order they are in. To find out this information you perform a three-point testcross with a fly that is heterozygous for all three alleles. The progeny of this cross are:

a/a B/b C/c    389

A/a b/b c/c     410

a/a b/b C/c       39

A/a B/b c/c       44

a/a b/b c/c        77

A/a B/b C/c      83

a/a B/b c/c          6

A/a b/b C/c         5

Total                 1053

(a) What is the recombination frequency between loci A and B?  

(b) What is the recombination frequency between loci B and C?  

(c) What is the recombination frequency between loci A and C?

(d) Are these loci linked?

(e) Demonstrate the physical arrangement of the genes on the chromosome, i.e. the order of the genes on a chromosome as well as their map distances.  

(f) Write out the genotypes of the parents for this cross, indicating which alleles are linked with one another for each parent?

Answer and Explanation:      

The Crossing-over frequency between two genes depends on the distance between them. A short distance between genes is a very little target for crossing-over to occur, which means that only a few of them will happen, compared with the number of events between genes that are more separated between each other.  Two genes that are very close will have a few recombination events and are strongly bounded.  While two separated genes will have more chances of recombination and are not bound.

To know if two genes are linked, we must observe the progeny distribution. In a tri-hybrid cross, If individuals, whos genes assort independently, are test crossed, they produce a progeny with equal phenotypic frequencies 1:1:1:1:1:1:1:1. If we observe a different distribution, that is that phenotypes appear in different proportions, we can assume that genes are linked in the heterozygote parent.

In the present example, the phenotypic ratio shows different proportions than the expected ones if they were not linked.

We can recognize the parental gametes in the descendants because their phenotypes are the most frequent,

a/a B/b C/c    389

A/a b/b c/c     410  

while the double recombinants are the less frequent.

a/a B/b c/c          6

A/a b/b C/c         5        

And simple recombinant gametes produced by the cross, which frequencies are intermediate.  

a/a b/b C/c       39

A/a B/b c/c       44                  

a/a b/b c/c        77      

A/a B/b C/c      83      

Comparing the parental and the double recombinant we will realize that they only change in the position of the alleles C/c. This suggests that the position of the gene C is in the middle of the other two genes, A and B, because in a double recombinant only the central gene changes position in the chromatid.

A------C------B

Now we will call Region I to the area between A and C and Region II to the area between C and B.

Once established the order of the genes we can calculate distances between them, and we will do it from the central gene to the genes on each side. First We will calculate the recombination frequencies, and we will do it by region. We will call P1 to the recombination frequency between A and C genes, and P2 to the recombination frequency between C and B.

P1 = (R + DR) / N

P2 = (R + DR)/ N

Where: R is the number of recombinants in each region, DR is the number of double recombinants in each region, and N is the total number of individuals. To calculate the recombination frequency, we have to know that 1% of recombinations = 1 map unit = 1cm. And that the maximum recombination frequency is always 50%.  

So:

Now, to calculate the recombination frequency between the two extreme genes, A and B, we can just perform addition or a sum:

P1 + P2= Pt

0.162 + 0.089 = Pt

0.251 = Pt  

The genetic distance will result from multiplying that frequency by 100 and expressing it in map units (MU).  One centiMorgan (cM) equals one map unit (MU). The map unit is the distance between the pair of genes for which one of every 100 meiotic products results in a recombinant product.

(a) What is the recombination frequency between loci A and B?    0.251

(b) What is the recombination frequency between loci B and C?   0.089  

(c) What is the recombination frequency between loci A and C?  0.162  

(d) Are these loci linked?  Yes. Their recombination frequency is inferior to 50% and the phenotypic rate is different from 1:1:1:1:1:1:1:1

(e) Demonstrate the physical arrangement of the genes on the chromosome, i.e. the order of the genes on a chromosome as well as their map distances.  

A-------------------C-----------------B

A--- 16.2 UM --C ---8.9 UM--B

A-------------25.1 UM--------------B

(f) Write out the genotypes of the parents for this cross, indicating which alleles are linked with one another for each parent?

a/a C/c B/b  x   A/a c/c b/b    

Answer:

questions:

Should I or can I eat salty foods?

Do I have to check my pressure immediately?

Do I have to follow a balanced diet?

Is it good to do physical activity?

Do I have to worry about the signs of eye flickering and headache?

Explanation:

Blood pressure is regulated by endogenous mechanisms, although these sometimes fail and it is necessary to take drugs to reduce high blood pressure, an example of which is beta-blockers.

Blood pressure is also regulated by diets based on low sodium consumption, necessary calories and with great contributions of nutrients since cardiac or cardiovascular health is also essential in the face of possible formation of atheroma plaques.

The increase in blood pressure with the appearance of atheroma plaques is very common, and it is also the two most frequent causes of AMI (acute myocardial infarction)

Answer:

1)How much does blood pressure rise because of stress?

2)Are there techniques that I can use to cope with stress?

3)Do these techniques help to reduce blood pressure?

4)Is exercise helpful in reducing blood pressure caused by stress?

5)Would medication help my condition?

6)Are there any other risk factors for high blood pressure?

Explanation:

Answer from plato.

Answer:

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Explanation:

While polar bears have shown some ability to adapt to changes in their surroundings – for example, by foraging for food on land – scientists project polar bears will become more food-stressed as sea ice diminishes and populations will decline. ... There are other impacts of climate change on polar bears, too.