15
MULTIPLE CHOICE QUESTIONS
PART A:
Choose the correct answer to each question from the alternatives A, B, C or D. Write +
of your choice in the box provided.
QUESTION 1
isted below are some characteristics of surface areas for gas exchange. Which one of
ecessary for effective gas exchange?
B.
Soft
Thin
D.
Surrounded by ca
Moist​

Answers

Answer 1

Answer:

thin

Explanation:

so there is faster diffusion rate and also there will be short diffusion distance which therfore will lead to effective exchange:)


Related Questions

Explain how in glycolysis that the spitting of one gluclose molecule results in 4 ATP but there is only a net gain of 2 ATP

Answers

Although four ATP molecules are produced in the second half, the net gain of glycolysis is only two ATP because two ATP molecules are used in the first half of glycolysis.

Body systems work alone to keep the body in a state of homeostasis

True or false

Answers

Answer:

False, the body systems have to work together to maintain homeostasis

Hope this helps!

Which of the following is a base used in DNA replication that is NOT used in translation?


i need asap!

Answers

Answer:

Hi, there, but I don't see multiple choices. May you please give me the answer choices. So I can help you

Explanation:

THYMINE

When dealing with base pairing in DNA...

g pairs with c and c with g.

a pairs with t and t with a.

But when dealing with base pairing involving RNA...

a pairs with u and u with a.

t pairs with a.

Hope this helped, if it did please mark me brainliest!

(I had misread your question before. Uracil couldn't be that base because it's not in DNA, and is in translation.)

What does a chromosome consist of?

A. Tightly wound DNA only.

B. Loosely dispersed DNA and proteins.

C. Tightly wound DNA and proteins.

D. Loosely dispersed DNA.

Answers

I think C, but I’m not sure.

Answer:

C

Explanation:

So, there are 2 different forms that DNA can be found in.

The more common form, where the DNA is loosly scattered.

There is a less common form, however, only found during cell division, which is a compacted form. The DNA is tighly wound in this case.

In the case of chromosomes, DNA is tightly pakced, and not loose.

Now, do they are do they  not have protiens?

Well, heres another question, how does the DNA get compacted?

It has to wrap around histone protiens.

The logn strands of DNA wrap around many histone protiens, until the full length of DNA has been compacted.

So to answer the question, yes, there are protiens found in chromosomes(specificly histone).

This means the answer must be C, since chrosomes are both tightly bound, and contain protein.

account for movement in metazoan​

Answers

Answer:

They are able to move water through their bodies through the coordinated beating of flagellated cells that line their pores.

Explanation:

Which of the following are examples of natural pollution? Choose all that apply.

car exhaust
volcanoes
pesticides
trash
forest fires
floods

Answers

car exhaust
pesticides
trash
forest fires

The examples of natural pollution are Volcanoes, Forest fires, and floods.

What do you mean by Pollution?

Pollution may be defined as the presence of any unwanted or contaminated substances in the atmosphere.

Car exhaust, pesticides, and trash are examples of artificial pollution.

Volcanoes release certain poisonous gases which are harmful to environment. Flood carries contamination like pesticides, chemicals, sewage waste, etc.

Forests fire are responsible for the increase of carbon dioxide in the environment.

Therefore, examples of natural pollution are Volcanoes, Forest fires, and floods.

To learn more about Pollution, refer to the link:

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The portion of the Earth and atmosphere where life exists is referred to as the ecosystem.
A True
B False

Answers

Answer:

true

Explanation:

backed up by the levels of organization

Which of the following is not true regarding the establishment of a neuron's resting membrane potential?

a. Resting membrane permeability to Na+ is very low.
b. Ion pumps in the plasma membrane eject sodium ions as fast as they cross the membrane.
c. Electrical forces do not push sodium ions into the cell.
d. Chemical and electrical forces both favor sodium ions entering the cell.
e. The chemical gradient for potassium ions tends to drive them out of the cell.

Answers

Answer:

c

Explanation:

c answer have a great day

HELPPPPPP PLEASEEEEE ILL GIVE BRAINLIEST AND POINTS!!!!
(you dont need to answer them all but at least help me with a couple)

1) Explain Uganda’s ABC program in the fight against HIV/AIDS

2) Why has the Ugandan government pushed Abstinence as a means of combating the spread of HIV/AIDS?

3) What risks are involved with the use of condoms in combating the spread of HIV/AIDS?

4) On a separate piece of paper, construct a population pyramid to illustrate the current age groups infected by HIV/AIDS in Uganda.

Answers

Answer:

1. Abstain, Be faithful, or, as a last resort, use a Condom. Within a few years, Uganda had developed what researchers call a "social vaccine" against HIV: cultural norms about sexual responsibility, preached in clinics and public schools, as well as churches and mosques.

3.When used correctly every time you have sex, condoms are the best way to prevent sexually transmitted infections such as HIV. They have a very low failure rate and are effective for all forms of sex.

HELP! I CANT FIND THIS IN TEH INTERNET!

Answers

Answer:

Met-Ser-Lys-Val-Phe

so none of the above

Explanation:

Answer:

Ah ok. Sorry this is due to what its called, not what it is.

Explanation:

This is a table of the MRNA that is transcribed to make protiens.

The UCAG found on the graph are the different RNA bases.

A single base codes for a single part of a protien.

A codon is made up of 3 base pairs. A single codon codes for a protien.

So lets look at the first 3 bases - AUG

This looks like MET

So, let me show you how I found this:

The first base pair is A, looking at the left 4 letters, we see is the third row down.

The second base pair is U, looking at the top, we see is this first row.

Now we know its the third row down, and the first one to the left.

So now we have 4 possible protiens.

To find the exact one, use the third base pair, which is G. This is the bottom of the mini row found in the right side.

Doing this, we find that MET is the protien.

To be honest I dislike this table, so I will be using the one attached below.

Anyway, this MET protient removed option B.

Next we have Codon CUC

Looking at my graph below, I see that CUC codes for LEU.

This removes ooptions A and D, leaving C.

But now we need to check wether it is C or none of the above.

Again, I take codon AAG, and find lys. This is in anser C.

I take codon UGC, and find cys. This is in answer c.

Finally, I take codon UUC, and find PHe. This is answer c.

So C is your answer.

Hope this makes sense and helps!

I personally find my graph easier to use, and fi you agree, then I suggest you use it!

What is the value of y in the equation 5x + 2y = 20, when x = 0.3? 0 2.5 2.8 O 9.25 O 10.75​

Answers

Answer:

O 9.25

Explanation:

The following mathematical equation is given in this question:

5x + 2y = 20

Using this equation, we're asked to find the value of y when x = 0.3. Hence, we substitute 0.3 for x in the equation as follows:

5x + 2y = 20

5 (0.3) + 2y = 20

1.5 + 2y = 20

Collect like terms

2y = 20 - 1.5

2y = 18.5

Divide both sides by 2

y = 18.5/2

y = 9.25

Therefore, y = 9.25 when x = 0.3

Select all the correct answers.
Which three statements provide reasons that scientists are considering renewable sources of energy?
1. Most renewable resources are clean and nonpolluting.
2. Renewable resources can be replenished.
3. Renewable resources are conventional resources.
4. Most renewable resources are easily available in nature.
5. All renewable resources are cost effective.


Answers

The three statement related to the renewable sources of energy should be clean & non-pollutting, conventional resources, and available in nature.

What is renewable sources of energy?

It is the energy that should be collected from the renewable resources that should be replenished on the timescale based on the human.

It involved the sources like the sunlight, wind, rain, etc.

Therefore, based on this, we can conclude that the option 1, option 3, and option 4 is correct.

Learn more about energy here: https://brainly.com/question/16627884

Chapter 1
1. Which of the following is an example of homeostasis?

a. regulation of blood CO2 level

b. regulation of blood glucose level

c. regulation of body temperature

d. all of the above

2. Which statement is a correct description of negative feedback control system?

a. It is stimulatory

b. It is inhibitory

c. It amplifies the change that is occurring

3. Positive feedback control system:

a. Are stimulatory

b. Tend to produce destabilizing effects and disrupt homeostasis

c. Produce an action that is opposite to the change that activate the same system

d. Both "a" and "b" are correct

4. The lungs are ____________ to the liver:

a. distal

b. lateral

c. inferior

d. superior

5. The heart is ___________ to the lungs:

a. superior

b. dorsal

c. medial

d. lateral

6. A vertical plane through the body dividing it into right and left is termed:

a. sagittal

b. lateral

c. transverse

d. frontal

7. A patient sustains severe blunt trauma to the left upper abdomen and requires surgery. The body organ most likely to be involved is the ____________

a. appendix

b. gallbladder

c. spleen

d. urinary bladder

8. Cytology is the study of:

a. tissues

b. organisms

c. cells

d. all of these are correct

9. A term that means nearer the attached end of a limb is:

a. medial

b. lateral

c. distal

d. proximal

10. Coronal plane:

a. Divides the body into anterior and posterior portions

b. Divides the body into upper and lower portions

c. Divides the body into left and right portions

d. Is also called horizontal plane

Answers

Answer:

homeostasis regulate body glucose

PLEASE HELP THIS IS DUE NOW
will mark brainliest!
10 points

Answers

Answer: B, D

Explanation: BrainEList me

Answer is B.
Please brainliest me :)

In a changing environment, which of the following would be beneficial for the survival of a species?
O offspring with a variety of phenotypes
O offspring with little variation in phenotype
O offspring that closely resemble their parents
O offspring that are adapted to a specific environment

Answers

The last one

Explanation:

Offspring that are adapted to a specific environment is the beneficial for the survival of a species.

What is species?

A species is an organism's fundamental unit of classification, taxonomic rank, and biodiversity. The biggest group of organisms in which any two individuals of the right sexes or mating types can conceive a fertile offspring, usually by sexual reproduction, is referred to as a species.

A species can also be identified by its karyotype, DNA sequence, anatomy, behavior, or ecological niche. In addition, since fossil reproduction cannot be studied, paleontologists use the chronospecies idea.

There are between 8 and 8.7 million different species of eukaryotes, according to the most recent accurate estimate.

All species are given a two-part name, or "binomial," with the exception of viruses.

Therefore, Offspring that are adapted to a specific environment is the beneficial for the survival of a species.

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The reason that the nailbed appears pink is the president of a large number of Melanocytes n the underlying dermis

Answers

Answer:

paki sagot po ito hahahaha

What effect can groundwater have on land?
A.) Increase in ground altitude
B.) Formation if sinkholes
C.) Decrease in oil salinity
D.) Formation of wetlands

Answers

Edited response:

B) Formation of sinkholes

Explanation:

"Groundwater pumping for urban water supply and for irrigation can produce new sinkholes in sinkhole-prone areas"

1. Compare a positive feedback loop and negative feedback loop for homeostasis. Body temperature is an example of a negative feedback loop. Imagine that body temperature was regulated as a positive feedback loop and explain what would happen.
2. Look at the figure of the brain lobes in your textbook. Do you think the chimpanzee would have the same brain lobes as that of a human? How might the chimp brain differ from a humans? Keep in mind the chimpanzee is the humans’ closest relative.

Answers

Answer:

Homeostasis typically involves negative feedback loops that counteract changes of various properties from their target values, known as set points. In contrast to negative feedback loops, positive feedback loops amplify their initiating stimuli, in other words, they move the system away from its starting state.

Explanation:

Chimpanzee lobes may be smaller than human lobes

Which is the word equation for photosynthesis?

Answers

Answer:

carbon dioxide + water + sunlight + chlorophyll → glucose + oxygen

Explanation:

I hope this helps in any way :)

Fat cells are expandable. How does this structure relate to a fat cell's function?

A) Fat cells store energy for the body to use later, so being
expandable would help with storage.

B) Fat cells burn energy quickly when other food source is available, so being expandable would help with the rapid burn.

C) Fall cells protect organs, so being expandable can help with cushioning.

D) Fat cells do not expand

Answers

Fat cells burn energy quickly when other food source is available, so being expandable would help with the rapid burn.

The relationship between the expandability of fat cells and a fat cell's function is ; ( A )  Fat cells store energy for the body to use later, so being expandable would help with storage.

Fat cells specialized for the storage of energy in human body is the Adipose tissue which can expand between 60 to 70% of the weight of the human body in response to changes in the energy balance of the body.

Adipose tissues store energy in form of triglycerides and in order to store more energy for later use the Adipose would need to be expandable to accommodate the required amount of energy.

Hence we can conclude that the relationship between the expandability of fat cells and a fat cells' function is Fat cells store energy for the body to use later, so being expandable would help with storage.

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When performing the streak for isolation technique, your result is unexpected: There is only growth obtained in quadrant 1. The growth observed in quadrant 1 is as expected, heavy with no isolated colonies. However, no growth is visible in any other quadrants.
Which of the following errors could explain this unexpected result?
A) The loop did not cross into quadrant 1 when streaking quadrant 2
B) You forgot to flame the loop in between quadrants
C) All of the errors listed here could be responsible for this unexpected result
D) Not enough bacteria was obtained from the starting culture when streaking quadrant 1

Answers

Answer:

A) The loop did not cross into quadrant 1 when streaking quadrant 2

Explanation:

The streak for isolation technique is a method used to get isolated bacterial colonies. This technique consists of, in a petri dish with culture medium, where, with the help of an inoculation loop, the bacteria are scratched on one side of the dish. This side is called the first quadrant. This inoculation loop must then cross with the first quadrant and be dragged to the second quadrant, where new lines must be made. This allows a part of the bacteria from the first quadrant to be carried over to the second. The inoculation loop must cross the second quadrant again to inoculate the third quadrant, and so on.

In this case, we can see that for bacterial colonies to grow in all quadrants, it is essential that the loop crosses in the first quadrant to cross out the second quadrant. If not, only the first quadrant will have bacterial colonies.

Answer:

A) The loop did not cross into quadrant 1 when streaking quadrant 2

Explanation:

There are many different techniques to isolate bacteria populations. Using solid media such as agar, you can perform the streak for isolation technique.

What you want to do by using this technique is to get an isolated colony of the bacteria of interest. And to get it, you need to dilute a sample or inoculum of bacteria as much as possible by streaking it. Every time you do it, you take fewer amounts of cells from the original sample, separating them each time more, to the point of having only one single cell apart by a few millimeters from another cell. The isolated cell divides and forms a new pure colony.

So basically, you need to imaginary divide the agar plate into four quadrants.

You sterilize the loop carefully and take a sample of bacteria, trying to get the smallest amount of inoculum. You will apply the loop with the sample in quadrant one and spread it. You close the plate and turn it, placing the second quadrant in front of you. You sterilize the loop again on the flame and let it cool. You perform the same motion in quadrant two but carefully touching the edge of quadrant one, so you can take some of the cells that you have already spread on it. Once you spread quadrant two, you close the plate and turn it again, so quadrant three is in front of you. You sterilize the loop again on the flame and let it cool. You perform the same motion in quadrant three but carefully touching the edge of quadrant two. Close and rotate the plate. You sterilize the loop and repeat the same motion in the last quadrant. Close the plate and take it to incubation. Finally, you put the loop on the flame for the last time.The importance of extending the streaks into the anterior quadrant is to take a few cells from there and to spread them in the following quadrant. In this way, you are diluting the original inoculum, and separating the cells each time more. The fourth quadrant should have a few isolated cells that will reproduce and form a pure colony. If you do not touch the anterior quadrant while streaking, you will not have any cell in the quadrant, and you will not observe any colony after the incubation. The importance of sterilizing the loop every time you change the quadrant is to avoid contamination with other species. If you do not flame the loop, the result will be too many colonies of different species, probably touching themselves, in each quadrant.

Es el nombre que se le da a un cuerpo celeste dentro de su trayectoria

Answers

aaaaaaaaaaaaaa‏‏‏‏‏‏‏‏ ‏‏‏‏‏‏‏‏ ‏‏‏‏‏‏‏‏ ‏‏‏‏‏‏‏‏ ‏‏‏‏‏‏‏‏ ‏‏‏‏‏‏‏‏ ‏‏‏‏‏‏‏‏ ‏‏‏‏‏‏‏‏ ‏‏‏‏‏‏‏‏ ‏‏‏‏‏‏‏‏

The_____
is like the ______
system of
the human body because they both_________.

Answers

Answer:

The cell wall is like the integumentary system of the human body because they both protect the interior from the external environment.

Explanation:

c: i just answered it and got it right

Answers

Answer:

good for you lol

Explanation:

in a paragraph explain what effect very small pores and their diffusion rate would have on the workings and mechanism of a cell

Answers

Answer:

So if the size of the pore is small then the rate of the diffusion will be very slow as the molecules will move from high concentration to low concentration in very slow rate.

Explanation:

I hope it helps you

What would you say to a friend that says "GMOs are dangerous to human health"?

Answers

Everything have both positive and negative impacts

Gmos( genetically modified organisms ) are good and dangerous both

if we carefully practice genetic engineering then it is beneficial but if we use it only for our income source without caring about its worst effects then its very dangerous

do roots have guard cells and therefore stomata?​

Answers

Answer:

Explanation:

Besides, plastids of the root guard cells (GCs) do not differentiate into chloroplasts but function solely as amyloplasts. Root stomata have a short life span. During rapid and intense root growth, GCs cannot keep pace with the elongation of their neighbouring rhizodermal cells

What are the necessary components required to start the transcription of a gene? What needs to be added in order to create a protein?
How does the length of the transcribed region impact the length of the gene (DNA)?
You accidentally produce a gene (strand of DNA) after you have filled up all five of your protein shapes? How would you eliminate this DNA?
Where does the negative transcription factor work?
Why are there more than one positive transcription factors on each of the three genes?

Answers

Answer:

What are the necessary components required to start the transcription of a gene?

Explanation:

Initiation. RNA polymerase binds to a sequence of DNA called the promoter, found near the beginning of a gene. Each gene (or group of co-transcribed genes, in bacteria) has its own promoter. Once bound, RNA polymerase separates the DNA strands, providing the single-stranded template needed for transcription.

I Hope this helps!

Initiation.

RNA polymerase binds to a sequence of DNA called the promoter, found near the beginning of a gene. Each gene has its own promoter. Once bound, RNA polymerase separates the DNA strands, providing the single-stranded template needed for transcription.

What is transcription?

Transcription is the process in which a gene's DNA sequence is copied (transcribed) to make an RNA molecule.RNA polymerase is the main transcription enzyme.Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of a gene.

Learn more about transcription below,

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Which lists the correct order of evolutionary history?
crabs, jellyfish, reptiles
mammals, amphibians, crabs
vertebrate fish, crabs, mammals
jellyfish, reptiles, mammals

Answers

Answer:

jellyfish, reptiles, mammals

Explanation:

I took a test on edg in 2021

The lists in the correct order of evolutionary history is jellyfish, reptiles, mammals.

What is Evolution?

This is the process which involves the modification of structures in

organisms as a result of natural selection thereby making them more fit in

the environment.

The jellyfish has less complex and specialized and mammals has the most

which is why option D is the most appropriate.

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Why must living organisms reproduce?

Answers

Answer:

reproduction it's important for the survival of all living organisms

Answer:

Reproduction is necessary for the continuation of the generation of particular species rather than the species extinct from the earth. It is also a source of recombination.

Explanation:

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