Your heart rate can be determined by counting the number of times your heart beats per minute. There are several places you can find your pulse—the rhythmic pressure wave of blood in the arteries. The radial pulse can be found by placing two fingers just below the wrist creases at the base of the thumb. Another common place to feel the pulse is the carotid artery in the neck. Place two fingers, index and middle, between the trachea and large neck muscle. Be sure to sit still without talking, and slowly move the fingers together until you can feel the blood flow. In this experiment, you’re collecting data to determine how holding your breath affects your heart rate. Write a hypothesis stating whether your heart rate will increase, decrease, or stay the same after holding your breath for 30 seconds. Also, identify the independent and dependent variables. Hypothesis: _______ Independent variable: _______ Dependent variable: _______

Answer:

When a neurotransmitter is released, the posterior receptor neuron has the receptor to bind to it because that neurotransmitter is a stimulator of the postsynaptic membrane.

Explanation:

The neurotransmitters that are released from the motor plate, that is, from the postsynaptic membrane to the presynaptic space, are captured by receptors of the postsynaptic membrane, which can be another neuronal structure to transmit an impulse or a muscle to be able to execute the contraction.

I leave you an image that draws up the stimulation of the postsynaptic membrane by means of a neutrotranismor, these are called as: adrenaline, norepinephrine, acetylcholine, etc.

Number 1 is the presynaptic membrane that releases the neurotransmitter (yellow balls), number 2 is the intersynaptic space, 3 is the postsynaptic membrane that in number 4 can be seen to be activated by relating to the neurotransmitter

Answer:

27 years

Explanation:

Answer:

chutiya bhanchod gand mar du teri

Answer:

b. It is based on the size of seismic waves

Explanation:

just did the test

The statement that describes one aspect of an earthquake's magnitude is: "It is based on the size of seismic waves."

An earthquake's magnitude is a measure of the amount of energy released by the earthquake, and it is determined by measuring the amplitude (height) of the seismic waves generated by the earthquake. The size of the seismic waves is directly related to the amount of energy released by the earthquake, and this is used to calculate the earthquake's magnitude.

The most commonly used scale for measuring earthquake magnitude is the Richter scale, which is based on the amplitude of the largest seismic wave recorded on a seismogram. Other scales, such as the moment magnitude scale, are based on the seismic moment, which takes into account the size of the fault rupture and the amount of slip on the fault.

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Answer:

true

Explanation:

Gases are in fact formless liquid that expands to occupancy the space or enclosure they are contained in.

Answer:

To the antigen so the enzymes are only present when the molecule of interest is also present

To the plastic of the reaction well so the enzymes can concentrate the molecule of interest

To the capture antibody so the enzymes are only present when the molecule of interest is also present

To the detection antibody so the enzymes are only present when the molecule of interest is also present

Explanation:

Answer:

Scientist makes 2 groups.

Explanation:

One experimentle group and other is controle group.

Answer:

A Because all are complex cells with certain functions that cannot be greatly altered without affecting fitness.

B Because VSG switching may not be restricted to trypanosomes.

C Because all have proteins in their cell walls or cell membranes.

D None of these answers are correct.

The answer is C .Because all have proteins in their cell walls or cell membranes.

Explanation:

Pattern recognition strategy employs the use of pattern recognition receptors which are proteins for the recognition of molecules frequently found in pathogens. When they are recognized, the body then marks the cells for destruction.

Pattern recognition strategy affect prokaryotic and eukaryotic pathogens as well as hosts because all have proteins in their cell walls or cell membranes and they help in the recognition of pathogens or host for further action on them.

Answer and explanation:

Among the main evidences of the theory of continental drift, we can mention the fit of the lines of the coasts of several continents, In addition to the similarity between several relief structures and rocks in different continents (such as mountain ranges found in South America and on the east coast of Africa).

There are also records of fossils of identical extinct plants, found on the African continent and also in countries like Australia, India and Brazil, for example.

Identical reptile fossils have also been found in Africa and South America, in addition to several correlations in the distribution of aquatic dinosaur fossils that lived in common areas of the ancient supercontinent.

Answer:

Similar rock types are found across continents.

Explanation:

i just know,im smart duh

Answer:

The answer is c.

Explanation:

Answer:

c

Explanation:

Answer:

true

Explanation:

Penicillin is a bacteria so it means it causes the production of antibodies which then boost the immune system.

It is like vaccination; small doses of the inactive form of the infection is injected into the body in order for the body to create antibodies resistant to such infection(thereby boosting the immune system).

Hope it helps.

Answer:

mass of CaCl₂ = 67.4 g of CaCl₂

Explanation:

A 45% CaCl₂ Solution contains 45 g of solute per 100 mL of solution.

mass concentration = mass of solute (g)/ volume of solution (L)

100 mL of solution = 100 * 1L /1000 = 0.1 L

Mass concentration of solution = 45 g/0.1 L = 450 g/L

Molar concentration of solution = mass concentration / molar mass

molar mass of CaCl₂  = 111 g/mol

molar concentration = 450 g/L / 111 g/mol = 4. 05 mol/L

Number of moles of CaCl₂ present in 150 ml of 4.05 mol/L  solution = molar concentration *  volume (L)

number of moles of CaCl₂  = 4.05 * 150 * 1 L/1000 = 0.6075 moles

mass of CaCl₂  present in 0.6075 moles  = number of moles * molar mass

mass of CaCl₂ = 0.6075 * 111 = 67.4 g of CaCl₂

Answer:

The answer is option B.

Hope this helps you

Answer:

Neuropeptides

Explanation:

They are proteins that function as chemical messengers and are released by neurons. They contain 3 to 36 amino acids.

Hope this helps!!! PLZ MARK BRAINLIEST!!!

Answer:

The expectations of the bands will be more on the gels.

Explanation:

One sample provides several sizes and thickness bands in the gel electrophoresis according to the size of fragments that run in it. An individual would expect more bands due to the increase in the number of samples which is 20 samples now.

An increase in the number of samples produces more bands. So one can easily expect more bands from the 20 samples. Scientists would get more bands on the gels.

Thus, the expectations of the bands will be more on the gels.

If the scientist collects 20 dung samples ; we should expect more band on the gel

Given that each dung sample has varying sizes and varying thickness of bands in the gel electrophoresis which depends on the size of fragments contained in it. Therefore when a number of dung samples ( 20 ) are collected  it is only logical that the number of bands on the gel will increase ( i.e. you should expect more band on the gel ).

Hence we can conclude that If the scientist collects 20 dung samples we should expect more band on the gel .

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Although your question lacks some data a general answer within the scope of your question is provided

Answer:

Hello

In the small intestines bile emulsifies fats while enzymes digest them. The intestinal cells absorb the fats. Long-chain fatty acids form a large lipoprotein structure called a chylomicron that transports fats through the lymph system.

hope this answer is correct

In the small intestines bile emulsifies fats while enzymes digest them. The intestinal cells absorb the fats.

Lipids (fats and oils) are broken down in the small intestine. The enzyme lipase is responsible for breaking down lipids into fatty acids and glycerol.

Micelles transport the end products of lipid digestion (free fatty acids and monoglycerides) to the digestive tract lining for absorption.

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Answer:

1. A. Pseudomonas and E. coli

2. B. Red without black center

3. B. Salmon/orange

Explanation:

Pseudomonas is referred to as an oxidase positive bacteria while E. Coli is an oxidase negative bacteria. The use of the oxidase test will be helpful in the differentiation of the two Bacteria according to their oxidase activity/properties.

Colonies of Red without black center color is what is expected on HE agar if shigellosis is suspected.

Colonies of Salmon/Orange color is what is expected on HE agar if Enterococcus sp. is suspected.

Answer:

Option C is the correct choice.

Explanation:

Some other choices provided do not correspond to the circumstance in question. And the correct response will be Option C.

The statement 'diploid sporophytes that produce spores by meiosis alternate with haploid gametophytes that produce gametes by mitosis' correctly describes the alternation of generations in a plant life cycle (Option C).

In plants, the diploid (2n) sporophyte undergoes meiosis to generate haploid (n) spores.

Subsequently, plant spores undergo successive mitosis to produce multicellular haploid (n) gametophytes.

In the gametophyte phase, a plant produces male and female haploid (n) gametes by mitosis in organs known as gametangia.

The diploid (2n) sporophyte is the zygote produced from the fusion of two (one male and one female) plant gametes. This zygote first develops into an embryo which will give rise to the adult sporophyte by successive mitosis.

In conclusion, the statement 'diploid sporophytes that produce spores by meiosis alternate with haploid gametophytes that produce gametes by mitosis' correctly describes the alternation of generations in a plant life cycle (Option C).  

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Answer:

Conditions:

**image also provided below for further clarification - all rights reserved to Mastering Genetics**

Explanation:

Conditions:

Because the replicated DNA is created, and the cell has twice as much genetic material, cells in the G2 phase have twice as much DNA.

A diploid cell's G1 phase marks the start of the cell cycle (DNA content = 2 N; N is the number of chromosomes).

The cell enters the G2 phase with twice as much DNA (4 N) as the starting cell after DNA replication is finished in the S phase.

DNA replication happens in the S phase, when DNA synthesis happens and the amount of DNA doubles. Once the G1 phase is over, each chromosome contains one chromatid.

Each chromosome will have two chromatids following the S phase, though. The two chromatids here are exact duplicates of one another.

Therefore, When a cell is in the G1 phase, it physically expands and produces more protein and organelles.

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Answer:

The answer is option C.

Hope this helps you

Answer:

Gender role attraction determine your sexual identificaton.

Explanation:

Complete question:

Part C: Using the Punnett square to make predictions

Use the completed Punnett square in Part B to answer the questions below about the F2 generation.

Note: You will find the Punnet square in the attached files.  

Note that questions 3 and 4 require a more advanced evaluation of probabilities than do questions 1 and 2 because you have to consider all possible groupings and orders of three F2 seeds. If you need help with these calculations, use Hint 3.

1) What is the probability that an F2 seed chosen at random will be yellow?

2)  What is the probability that an F2 seed chosen at random from along the yellow seeds will breed true when selfed?

3) What is the probability that three F2 seeds chosen at random will include at least one yellow seed?

4) What is the probability that three F2 seeds chosen at random will include one green seed and two yellow seeds?  

Answer:

1) 3/4              

2) 1/3

3) 63/64

4) 27/64

Explanation:

Parental) Yy   x   Yy

Gametes) Y   y   Y   y

Punnet Square)

                      (1/2) Y            (1/2) y

      (1/2) Y    (1/4) YY         (1/4) Yy

      (1/2) y     (1/4) yY          (1/4) yy  

F2)  1/4 YY

      2/4 = 1/2 Yy

      1/4 yy

1) There will be 3/4 of probabilities of getting a yellow F2 seed

   1/4 YY + 2/4 Yy = 3/4 Y-

   The symbol "-" means that in its position there might be either a Y or y allele.

2) As there are only three yellow possible genotypes for yellow seeds, the fourth genotype for green seeds is not considered. Our pool now is only yellow seeds. So the probability of getting a pure breeding yellow seed among all yellow seeds is 1/3.  

   1/3 YY

   1/3 Yy

   1/3 yY

In the pool of yellow seeds, there are three genotypes, and only one of them corresponds to pure breeding yellow seed.

3) To calculate the probability of getting at least one yellow seed among the three seeds randomly chosen, we need to multiply and then perform addition. This is, when we take three seeds from the pool, we have different possibilities of getting seeds with different genotypes. So:

There might also be one green sees and two yellow seed, so we multiply their probabilities in the order in which we might get them. This is:

And we could also get two green seeds and only one yellow seed:

Now, having all the possibilities, we just need to add all the possibilities:

27/64 + 9/64 + 9/64 + 9/64 + 3/64 + 3/64 + 3/64= 63/64.

Note that we did not include the possibility of getting three green seeds (1/4 x 1/4 x 1/4). This is because we were asked to calculate the probabilities of getting AT LEAST one yellow seed.

4) To calculate the probability of getting two yellow seeds and one green seed among the three seeds randomly chosen, we should multiply probabilities and then sum them up.

The orders in which we could get the seeds are:

Now, having all the possibilities, we just need to add all the possibilities:

6/64 + 9/64 + 9/64 = 27/64.

Answer:

1) 3/4

2) 1/3

3) 63/64

4) 27/64

Explanation:

1) yellow seed could either be GG, Gg or Gg from Punnett square, therefore, there is a 3/4 probability

2) true-breeding = either GG or gg. Therefore, out of the 3 yellow seed options, only 1 is true-breeding, therefore, it's a 1/3 probability

3) "there are 7 possible groupings that have at least 1 yellow seed; the sum of their individual probabilities yields the final answer of 63/64. Note that you could have also calculated this answer by subtracting the probability of the one category that doesn’t fit the criterion (Green, Green, Green) from the total probability (1 – 1/64 = 63/64)"

4) "there are 3 possible groupings that have 1 green and 2 yellow seeds; the sum of their individual probabilities yields the final answer of 27/64"

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Answer:

90 percent

Explanation:

Based on average estimated juvenile and adult survival rate for each species

Answer:

Carbon

Explanation:

Reverse photosynthesis

Answer:

carbon dioxide

Explanation:

our body changes it

Answer:

The statements are:

Pumps K+ out of the cell False

Pumps K+ions into the cell True

Exchanges 3 Na+ ions for 2 K ions+ True

Exchanges 3 K+ ions for 2 Na+ ions False

Creates a membrane potential that is negative on the inside True

The transport protein becomes adenylated by ATP during the transport cycle True

Pumps Na+ ions out of the cell True

Pumps Na+ ions into the cell False

Explanation:    

Sodium Potassium Adenosine Triphosphatase is in the membrane of cells.  Its function is to create a difference of charges between the inside and the outside of the cell. The enzyme pumps 3 Na+ ions outside the cell for every 2 K+ ions that pumps inside the cell producing a resting potential. As this process is against their concentration gradient, the protein needs the energy to do it. This energy comes from the ATP  that attaches to the transport protein.

Answer:

Perennation brings adaptive advantages to the plant under unfavorable seasonal conditions

Explanation:

Perennation can be defined as the potential of plants for surviving in unfavorable seasonal periods including, for example, drought or extreme seasonal temperatures. Perennation is a process associated to the evolution of adapted 'perennating organs' capable of storing nutrients, which will be subsequently used during unfavorable conditions. Examples of such perennating organs include bulbs, rhizomes, and tubers, which are usually related to the asexual reproduction processes of plants.

The answer you are looking for is A

Answer:

iron

Explanation:

iron is present in red blood cells. Without it the RBC's start to die and are less in number. Which causes anaemia.