Which of the following is an example of evolution that can be studied firsthand by
scientists while it happens (meaning that scientists have opportunities to perform
experiments and to measure the outcome)?
A) The gradual decent of whales from tetrapod (four-legged) land mammal
ancestors
B) A dog shedding its thick winter fur so that it can stay cooler in the summer
C) The acclimation of a person's body to the low oxygen atmosphere at high
altitudes
D) The development of antibiotic resistance in bacteria

Answers

Answer 1

Answer:

c.

Explanation:

The acclimation of a persons body to the low oxygen atmosphere at high altitudes


Related Questions

I’m stuck with this Encryption Table, if anyone can please help me solve this I would appreciate it very much.

Answers

Answer:

hu7gf6dcxyxycjc c.f. c ycyftc Tx tv hcv12345678910112131415161727 8gh

What controls when a cell divides?

Answers

Answer:

A variety of genes are involved in the control of cell growth and division. Tight regulation of this process ensures that a dividing cell's DNA is copied properly, any errors in the DNA are repaired, and each daughter cell receives a full set of chromosomes.

Explanation: hope this helps love

Answer:

A variety of genes are involved in the control of cell growth and division. Tight regulation of this process ensures that a dividing cell's DNA is copied properly, any errors in the DNA are repaired, and each daughter cell receives a full set of chromosomes.

Explanation:

An individual is heterozygous for a gene at a specific locus. ________ will have the same form of alleles at that locus after S phase.A. Sex chromosomes.B. Homologous chromosomes.C. Non-sister chromatids.D. Sister chromatids.

Answers

Answer:

D

Explanation:

Sister chromatids will have the same form of alleles at the locus after S phase.

This is because during the S phae of the cell cycle, sister chromatids are replicated in preparation for cell division. The replication process is quite accurate such that all the alleles present on the initial chromatids are also replicated on the new sister chromatids. Hence, both new and old chromatids will have the same form of alleles at the locus after replication at the S phase. In other words, sister chromatids are exact copy of one another.

The correct option is D.

A structure that looks the same and does the same job but was not present in a common ancestor is termed:______.

Answers

Answer:

The correct answer is - analogous.

Explanation:

Analogous structures or organs are the structures with the same look which is developed to perform the same job and not present because inherited by a common ancestor.

These structures are present in unrelated organisms and look the same from outside and perform the same action for example wings of bat and birds look and perform the same action but not inherited from a common ancestor.

CAN SOMEONE HELP!!!!!

Answers

Answer:

B and i think D

Explanation:

The mitotic spindle and microtubules were not present in the mitosis models; describe their process throughout the steps of mitosis.

Answers

Answer:

Following are the solution to this question:

Explanation:

In a spindle in prophetic (mitotic apparatus) spindle, pulley and cellular membranes form at the kinetochore of metaphase genes intended besides separation of anaphase daughter chromosomes.

Even though the cycle of creation of the cells move towards opposite poles, microtubules gradually form a network between them, and its duplicate chromosomes would be later removed.

In which state of matter do the particles move independently of one another?
A.amorphous solid
B.Gas
C.Crystalline solid
D.Liquid

Answers

Answer:

I Think Gas

The gaseous state has very loose and unorganized structuring of particles, making them have little attraction and move independently.

If one strand of DNA has the base sequence TTCCGGAA The complementary strand has which of the following sequence?

Answers

Answer:

If a DNA strand has the base sequence TTCCGGAA the complementary strand has the sequence AAGGCCTT.

Explanation:

A DNA molecule is constructed from sequences of its four nitrogenous bases: adenine, thymine, guanine and cytosine. Since DNA is made up of two strands, the sequence of nitrogenous bases of one strand is complementary to the other .

The complementarity of the bases is a characteristic of the nitrogenous bases in the nucleic acids to combine with their complementary base, which is the same as saying that purines complement with pyramidines.

Adenine is combined with Thymine A=T Cytosine is complemented with Guanina C≡G

In this way, given a sequence on a DNA strand :

    T-T-C-C-G-G-A-A

The complementary strand will have this sequence:

    A-A-G-G-C-C-T-T

9. A pattern of stars that has been named is called a constellation. One winter evening, Jason
found the star called Sirius in the constellation called Canis Major.
Canis Major
Sirius
Muliphen.
Murzim
Wezen
Aludra
Adara
If Jason came outside again a few hours later, what would the stars in Canis Major look like?
A. The pattern of stars would appear to be in the same place in the sky.
B. The pattern would change because each star would have moved in a different direction.
C. The pattern of stars would appear to have moved together across the sky.
D. The pattern would be smaller because the stars moved closer together.

Answers

Answer

i think its C.

Least specialized cells to most specialized cells

Answers

Answer:

1)  Zygote cell

2) Blastocyst cells

3) Mesoderm cells

4) Heart Cells

Hopefully, it helps. :)

How do plants contribute to the water cycle?

Answers

Answer:

Plants absorb water from the soil. The water moves from the roots through the stems to the leaves. Once water reaches the leaves, some of it evaporates from the leaves, adding to the amount of water vapor in the air. This process of evaporation through plant leaves is called transpiration.

I really hope this helps!

Plants contribute to the water cycle in several ways through Transpiration, evaporation, Precipitation: and infiltration.

How do we explain?

Plants take in water through their roots and transport it up to their leaves. As water evaporates from the leaves, it creates a force that pulls more water up from the roots through a process called transpiration, and it is a major way that water moves through the atmosphere.

Water from plants and soil also evaporates into the atmosphere. This process is called evaporation, and it is another important way that water moves through the water cycle.

When water vapor in the atmosphere cools, it condenses and falls back to Earth as precipitation. This can be in the form of rain, snow, sleet, or hail.

Learn more about water cycle at:
https://brainly.com/question/25796102

#SPJ6

Due to the higher concentration of oxygen (O2) in the air than your blood, oxygen goes from the lungs into the red blood cells by ... *

PLEASE HELP I WILL MARK BRAINLY

THANK YOU

Answers

oxygen goes from your lungs into the red blood cells by simple diffusion

Due to the higher concentration of oxygen in the air than your blood, oxygen goes from the lungs into the red blood cells by simple diffusion.

It should be noted that oxygen diffuses from the lungs into the red blood cells. It then binds to hemoglobin. A molecule of hemoglobin can bind with four molecules of oxygen.

Since the red blood cells have cell membranes that are thin, this then enables oxygen to be able to diffuse quickly.

In conclusion, the correct option is simple diffusion.

Read related link on:

https://brainly.com/question/18500054

help me w this pls would mean a lot

Answers

Answer D

Explanation: All the previews could cause it

When an oxygen atom forms an ion, it gains two electrons.
What is the electrical charge of the oxygen ion?
2
1
O +1
O + 2

Answers

[tex]\huge\underline{\overline{\mid{\bold{\pink{ANSWER-}}\mid}}}[/tex]

O+2

What are some of the interactions the respiratory
systems has with other body systems?

Answers

Answer:

The respiratory system interacts with the circulatory system by replenishing the blood flow from the heart with fresh oxygen, and taking out waste gases like CO2 from the blood.

Explanation:

Any interaction of the respiratory system with another system would be any function where both systems are involved. Hope this helps!

You dilute an unknown sample of bacteria to 1 x 10-6 and plate out 10 onto a Petri dish. The next day you count 64 colonies. The number of viable bacteria in the original sample was:___________. a. 6.4x105 cells/ul b. 6.4x 106 cells/ul c. 6.4 x 107 cells/ul d. 6.4 x 108 cells/ul

Answers

Answer:

b

Explanation:

The correct answer would be 6.4 x [tex]10^6[/tex] cells/ul.

For 1 x 10-6 dilution, the plating factor is [tex]10^6[/tex]. To find the number of bacteria in the original sample, the plating factor is multiplied by the colony count per ul.

Number of viable bacteria = plating factor x colony count/ul

Since 10 ul gives 64 colonies.  1 ul will give:

         64/10 = 6.4 colonies.

Therefore, the viable bacteria in the original sample = 6.4 x [tex]10^6[/tex] cells/ul

The correct option is b.

Please solve this lab reportJohn had a science fair project that he needed to do. He wanted to test the effects that organic and chemical fertilizers had on plant growth. John predicted that the organic fertilizer would make the plants grow taller. He used three pots, three of the same type of seed, soil, organic fertilizer, chemical fertilizer, water, and a ruler. John put soil in the pots. He added chemical fertilizer to the first pot, organic fertilizer in the second pot, and no fertilizer in the third pot. He then planted one seed in each pot. John had to water the pots daily. He also checked for growth and took measurements for a period of 10 days. He measured the height of the plants. FIll out this templatePractice Writing a Lab Report Instructions: Use the lab example given to complete the Practice Writing a Lab Report activity. Please fill in this lab report with the appropriate information and data. Title: Include your name, instructor’s name, and the name of the lab Objecti

Answers

Answer:

This question is incomplete; the complete part is: what are the independent, dependent, and controlled variables?

Independent variable: ORGANIC AND CHEMICAL FERTILIZERS

Dependent variable: HEIGHT OF PLANT

Controlled variable: Same type of seed, water

Explanation:

Independent variable is the variable that is changed or manipulated by the experimenter. In this question, John wanted to test the effects that organic and chemical fertilizers had on plant growth. Hence, the independent variable is the ORGANIC AND CHEMICAL FERTILIZERS used.

Dependent variable is the variable that responds to changes made to the independent variable. The dependent variable is the variable that is measured in an experiment. In this case, the HEIGHT OF PLANTS MEASURED is the dependent variable.

Controlled variable or Constant is the variable that is kept unchanged throughout the experiment in order not to influence the experimental result or outcome. In this case, the controlled variable is the SAME TYPE OF SEED USED, WATER.

Independent Variable: organic + chemical fertilizers
Dependent Variable: height of the plants
Controlled Variable: seed, soil, water

Biology: Performance Task 1 (USATESTPREP) What goes in the blanks in each column of the Venn Diagram? Need help ASAP (30 minutes or less)

Answers

Answer:

ok hollup ima need to get it up

There is a healthy bacterial culture growing in the exponential phase . A technician wants to make a growth curve by making cell counts over the day . She plans to take the samples every 30 minutes during the day , hold the samples at room temperature , and then process all samples together at the end of the day .

A) what is the problem with her plan?
B)can she do anything to improve the accuracy of her results ?

Answers

A) WHAT IS THE PROBLEM WITH HER PLAN?

Binary fission is one of the asexual process by which most bacteria reproduce, the binary fission brings about a doubling of the number in bacterial cells that are viable.

Generation time is that time that it will require for a cell population to divide and double, it is also known as doubling time. This Generation time varies among distinct organisms and also varies among culture conditions.

Take for instance,a fast growing bacterium that is under an ideal culture conditions has a doubling time of 20minutes and for the bacteria that is grown in a condition that is not so ideal,may have a doubling time of hours.

The major challenge/ problem with her plan is that as she takes the bacterial sample every 30minutes, and then hold the sample till the last sampling is done in the day,those bacterial cells that are collected in the initial intervals will then get divided and further gives a result that is false.

However,if those bacteria that are collected aren't stored in a culture environment that is standard,the bacterial cells may die off and thus will further bring about a false result.

2) CAN SHE DO ANYTHING TO IMPROVE THE ACCURACY OF HER RESULT?

Solution for rectifying the error in her plan;

She can go ahead and add 50-100 μl of formaldehyde to all the culture suspensions that she has and has taken every 30minutes.

As the formaldehyde will fix the bacterial cells,The optical density present in all those aliquots can then be retrieved/taken at the end of the day.

Looking at it alternatively, aliquot 1ml of the culture suspension at an interval of every 30 minutes,and then take the optical density that is OD at a wavelength of 600nm making use of spectrophotometer until the reason you get becomes static.

Help me please if u don't know don't answer please​

Answers

Answer:

I would love to help but I got that answer wrong before and I keep trying over and over again

Explanation:

PLSS HELP ,, - - - A group of students were testing different insulators. They used three metal cans, one wrapped with bubble wrap, a second with a paper towel, and third unwrapped. Equal amounts of hot water were poured into each can and the temperature was noted at definite time intervals. The data is shown in the table.
From the data what can you conclude which is the best insulator?


Aluminum can wrapped with paper towel


Just the aluminum can


Aluminum can wrapped with bubble wrap

Answers

Answer:

Without the table, I can't be 100% certain, but I'm sure that your answer is C). It would only make sense, considering the fact that if bubble wrap is being used, you've put 2 layers of plastic and one layer of trapped air between the can and the hand of those who hold it, thus reducing the amount of thermal energy transfer.

_ can cause drain pipes to become to become clogged. A. Hydrotropism B. Thigmotropism​

Answers

Answer:

b

Explanation:

Answer:

I think B

Explanation:

Hope this helps

please help me with this question:)

Answers

Answer:

Pokaryote is the right answer.

Answer:

C: Prokaryote

Explanation:

This is not an animal or plant cell

name six harmful substance in food production

Answers

Answer:

Expired food and drugs; expired food and drinks that has stayed beyond the appropriate time

Impure water; impure water is dirty water that is not fit for the body system

Unripe fruits; fruits that is not yet due for...

Infested food

Poorly cooked food

Cigarette

Explanation:

Herbicides, pesticides, and chemical fertilizers are some examples, but sterilizing chemicals and preservatives can potentially be harmful if not used properly.

A population of rabbits has individuals with fur coloring that ranges from white to brown. The population lives in a temperate deciduous forest where the summers are mild and average about 50 degrees Fahrenheit. The winters are often below freezing.


If warmer temperatures last longer into the fall and the average temperature in the winter is getting warmer, what do you expect to happen to the population?


A) The percentage of the population with brown fur will decrease.


B) The percentage of the population with white fur will decrease.


C) The percentage will increase in size, but the color percentages will remain unchanged.


D) The percentage will decrease in size, but the color percentages will remain unchanged.

Answers

Answer:

The answer is B.

Explanation:

If warmer temperatures last longer there will be no need for the white fur

help^
answer that......

Answers

Answer:

yes yes yes no yes

Explanation:

yes yes yes no yes for the above question.

if today's first high tide is at 7:00 AM, what time will today's next high tide be? Please do not troll. . . . I have already asked this question like 7 times already and got no answer, except foolishness. Please. :(

Answers

7:25 pm. High tides are 12 hours and 25 mins apart. So 12 hours from 7:00 am is 7:00 pm, add 25 mins and you have 7:25 pm. Hope this helps! ;)

Which is an example of radiation?

A melting snowman sweats drop of water under a bright sun.
A smiling man roasts marshmallows over a wood fire.
A cook stirs vegetables in a frying pan over a gas burner.
Three pairs of bare feet and lower legs walk across black pavement.

Answers

Answer:

A: melting snowman sweats drop of water under a bright sun

Answer:

The correct answer is A.

the girl was observing a slide o
f muscle under microscope identified the muscle of striated on the basis of​

Answers

Answer:

muscles carry lines, the texture is often different by that of tissue that is visible to the eye.

Explanation:

what are skeskeleton bones​

Answers

Answer:

the bones that are inside your body

Answer: an internal or external framework of bone, cartilage, or other rigid material supporting or containing the body of an animal or plant. so like the domes help us stand up and do other stuff and without them we would be on the ground lol

Explanation:

Other Questions
What role does the President fill when working with Congress to pass laws? * What is 325.623 rounded to the nearest tenth? The top view of a portion of streets in Buffalo, New York is shown. Williams Street runs parallel to Broadway Street and the angle where the Storage is located has a measure of 120 degrees.Identify other businesses that occupy corners with an angle measure of 120 degrees. Select all that apply. Answer Choices: Auto PartsCharityFurniturePharmacyRestaurant How do unbalanced forces acting on an object affect its motion when the object is at rest? What if it is moving? I WILL GIVE BRAINLIEST. I NEED ANSWER ASAP. F = 5 NewtonsW = 75 Joulesd = ?ANSWER A large bottle of juice contains 500 milliliters. A smaller size bottle has 70% as much juice. How many milliliters or juice are in the smaller bottle? Please help! what is an equation of a parabola with x-intercepts at (2,0) and (-7,0) and which passes through the point (1,32)? 3. Given A(3,5), B(7, 10), C(0, 2), and D(1, a),determine the value of a for which:a) Line AB is parallel to line CD.b) Line AB is perpendicular to line CD.please help!! im failing grade 10 precal and i need this will give 15 points PLEASE HELP! In each pair of triangles, parts are congruent as marked. Which pair of triangles is congruent by ASA? Fill in the blank in the following sentence with the appropriate form and tenseof the verb entendre below.Avant, nous ____ les oiseaux chanter dans le jardin. A. avons entenduB. entendionsC. entendaitD. entendons Why did Iran choose democracy Determine whether the graph represents a function? None are correct The relation is a function The relation is not a function The President uses this foreign policy tool by sending troops to invade a country that is harboring terrorists.A.DiplomacyBMilitaryC.TreatyD.Sanction The si unit of average speed is m.s. True or False. anyone who is right I will give him brainlist if you are sure Note that common activities are listed toward the top, and less common activities are listed toward the bottom. According to O*NET, what are some common work activities Heating and Air Conditioning Mechanics and Installers perform? Check all that apply.getting informationmonitoring and controlling resourcesstaffing organizational unitsmaking decisions and solving problemsperforming general physical activitieshandling and moving objects Which of the following is not a reason scientists use models to study the layers of the Earth?A. Scientists cannot directly observe the layers of the Earth.B. Earths layers are too big to observe.C. Scientists can use seismic waves to learn about the layers of the Earth.D. Scientists have not been able to drill past the crust. I NEED HELP THIS IS DUE ASAP pls help me yes you help How should you punctuate a SHORT STORY title?Underline or italicize the title.Put a comma in the title.Capitalize every letter of the title.Put quotation marks around the title