Approximately 3.85 billion years ago, a group of single-celled microorganisms known as __________ were alive, reproducing, and evolving.

Answers

Answer 1

Microbes.  — cells that have a nucleus, like an amoeba or a paramecium


Related Questions

Recall what you know about hypertonic, hypotonic, and isotonic solutions. When an environment is hypotonic, what happens
to the cell?

Answers

Hypotonic solutions are lowly concentrated solutions
Hypertonic are highly concentrated solutions
While isotonic have equally concentrated

When a cell is placed in a hypotonic sol water moves out of the cell by osmosis making the cell flaccid

When a cell is submerged in a hypotonic solution, water osmosis causes the cell to become flaccid.

What is osmosis?

A semi-permeable membrane is used in the process of osmosis, which allows solvent molecules to move from a solution of low concentration to a solution of high concentration.

Osmosis is a passive process that doesn't require any energy to complete. In order for the concentrations on either side of the membrane to be equal, molecules must shift from an area of greater concentration to one of lower concentration.

Any solvent, including gases and supercritical liquids, can go through the osmosis process.

When solute concentrations inside and outside of the cell are equal, an isotonic solution has been created.When the concentration of solutes outside the cell is higher than within, the solution is said to be hypertonic. When the concentration of solutes inside the cell is higher than outside, the solution is said to be hypotonic.

Therefore, when a cell is submerged in a hypotonic solution, water osmosis causes the cell to become flaccid.

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freshwater fish excrete nitrogenous wastes as _____.

Answers

It released such as poop and children

Underground stem of which of the following does not store food? a)Zaminkand
b)Colocasia
c)Turmeric
d)Asparagus​

Answers

Answer:

asparagus doesn't store food.

persistent depressive disorder, or dysthymia, is characterized by

Answers

Given what we know, we can confirm that persistent depressive disorder, or dysthymia, is characterized by the presence of prolonged depressive symptoms.

What is a depressive disorder?A depressive disorder is a condition that causes a lack of motivation, happiness, and other positive feelings.Depression is experienced by millions of people from around the world. It can be induced by events in one's life, or be caused by a chemical imbalance in the brain.

What separates it from depression?What separates a depressive disorder from a more common case of depression is the frequency by which the symptoms manifest. They are known as depressive disorders when the symptoms are chronic in nature, meaning they manifest repeatedly and for prolonged durations.

Therefore, we can confirm that persistent depressive disorder, or dysthymia, is characterized by persistent symptoms relating to depressive episodes, that are chronic in nature and often caused by chemical imbalances in the brain.

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Damage to the capillaries throughout the body can directly cause which problem?

A

Inability of the body to absorb nutrients from food

B

Inability of the body to send oxygen to tissues

C

Inability of the body to release food energy

D

Inability of the body to receive information from the legs

.

Answers

Answer:

B. Inability of the body to send oxygen to tussues

what hormone directly opposes the actions of natriuretic hormones?

Answers

Aldosterone!
Explanation: Aldosterone reabsorbs sodium in which is associated with osmotic recovery of water is in direct opposition of natriuretic hormones since it allows secretion of water.

The hormone that directly opposes the actions of natriuretic hormones is aldosterone.

Aldosterone is a hormone produced by the adrenal glands, specifically the adrenal cortex. It acts on the kidneys to promote the reabsorption of sodium ions and the excretion of potassium ions.

Natriuretic hormones, on the other hand, promote the excretion of sodium ions and the reabsorption of potassium ions in the kidneys, leading to increased urine production and decreased blood volume.

Therefore, aldosterone counteracts the effects of natriuretic hormones by increasing sodium reabsorption and reducing potassium excretion, which helps to retain water and maintain blood pressure.

In summary, while natriuretic hormones promote sodium excretion and water loss, aldosterone works in the opposite direction by promoting sodium reabsorption and water retention.

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(compound microscope)
1. Put a table lamp in front of the?
2. Put a low-power (, e.g., x5) ________into
the microscope.
3. Rotate a low-power (e.g., x4)
______________into position.
4. Look through the eyepiece. Adjust the __________________ until you see a bright circle of light.
5. Place a slide on the _________, and fix it with the __________. The ___________ on the slide should be right above the hole of the stage.
6. Look at the microscope from the side. Turn the ______
carefully to lower the objective until it is very close to the ________.
7. Look through the eyepiece. Turn the coarse
adjustment knob to raise the objective slowly until
you can see an __________ of the specimen.
7. Turn the ________ to get a sharper image. The image is now in focus.


Choices: microscope, eyepiece, objective, coarse adjustment knob, slide, specimen,
mirror, stage, clips, fine adjustment knob, image

Answers

In this exercise it is necessary to fill the gaps with the correct given word. So, the right order of words will be:

1. microscope

2. eyepiece

3. objective

4. mirror

5. stage

6. clips

7. specimen

8. coarse adjustment knob

9. slide

10. image

11. fine adjustment knob.

So, after filling all the gaps, the text and, consequently, the final answer will be:

1. Put a table lamp in front of the microscope.

2. Put a low-power (, e.g., x5) eyepiece into  the microscope.

3. Rotate a low-power (e.g., x4)  objective into position.

4. Look through the eyepiece. Adjust the mirror until you see a bright circle of light.

5. Place a slide on the stage, and fix it with the clips. The specimen on the slide should be right above the hole of the stage.

6. Look at the microscope from the side. Turn the coarse adjustment knob

carefully to lower the objective until it is very close to the slide.

7. Look through the eyepiece. Turn the coarse  adjustment knob to raise the objective slowly until  you can see an image of the specimen.

8. Turn the fine adjustment knob to get a sharper image. The image is now in focus.

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explain the significance of chemical digestion!! marking brainliest please help

Answers

Answer:

Chemical digestion is a vital part of the digestive process. Without it, your body wouldn't be able to absorb nutrients from the foods you eat. While mechanical digestion involves physical movements, such as chewing and muscle contractions, chemical digestion uses enzymes to break down food.

what is the texture of a butterfly wing.​

Answers

Answer: soft, chalkey

Explanation: .

If a sexually reproducing organism has 28 chromosomes in it body cells, how many chromosome did it inherit from each parent?

A. 7
B. 14
C. 16
D.28

Answers

14 is the correct answer. The reason being 28 divided between two parents is 14!

Help quick!!!!!! In dire need 1st and the correct answer gets brainliest.

Answers

Answer:

they can all be applied to other plants.

they can all be easily observed (i got the question right on the test :)

Give an example in which you control temperature to influence a chemical change.

Answers

Answer:

100* farenhights

Explanation:

A cross in which only a single trait with two variations is considered is called a(n) cross or single factor cross.

Answers

Answer:

Monohybrid

Explanation:

During the final events of cellular respiration, oxygen combines with ________ to form ________. hydrogen ions only; water carbon only; CO2 energy-depleted electrons and carbon; CO2 energy-depleted electrons and hydrogen ions; water energy-depleted electrons only; water

Answers

Answer:

energy-depleted electrons and hydrogen ions; water

Explanation:

which set of parents did the offspring come from?

Answers

Answer:incian.

Explanation:

which of the following is a way that human modification of limiting factors causes unbalance in ecosystems? a. habitat loss b. pollution c. climate changes d. all of the above

Answers

Answer:

D all of the above

Explanation:

The way that human modification of limiting factors causes imbalance in the ecosystem is : ( D ) All of the above

What are limiting factors

Limiting factors are factors contraining the growth of a population in an ecosystem. the modification by humans on these limiting factors causes an imbalance in the ecosytem which leads to loss of habitat, pollution and climate changes.

Hence we can conclude that The way that human modification of limiting factors causes imbalance in the ecosystem is : ( D ) All of the above.

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What would be most likely to happen to a plant that had working chloroplasts in its cells but had taken in a poison that kept mitochondria from working? (1 point)1.It would use its chloroplasts to do the work the mitochondria should have done.2.It would use the energy from the Sun to replace the energy provided by mitochondria.3.It would have a difficult time gathering enough solar energy during photosynthesis.4.It would not be affected since plants do not require mitochondria.

Answers

Answer:

It would use its chloroplasts to do the work the mitochondria should have done

17) The function of the kidneys is to cleanse the blood. To do that, kidneys filter almost everything from the blood, and then put most everything back in to the blood. One of the
substances filtered and then put back is glucose. If a doctor notices that there is glucose in a patient's urine sample, then what would be a reasonable explanation?
1. The patient must be on a low carbohydrate/high protein diet.
II. The patient has too many carbohydrates in his/her blood.
111. The patient is dehydrated.
IV. The patient has diabetes.
A) I only
B) il only
I and II only
D) II and IV only

Answers

Answer:

I think its II and Iv

Explanation

Because when they is glucose in a patient's urine it means that the patient has diabetes or are too many carbohydrate in his or her blood

if a patient eat too much food containing carbohydrates ,the digestive system breaks down the digestible one into sugar which enters the blood. As blood sugar level rises ,the pancreas produces insulin(a hormone that prompt cells to absorb blood sugar for energy or storage)

I need the order please

Answers

What are the options

Under the hypothesis of blending inheritance, what color(s) would the offspring of a black cat and a white cat be

Answers

Under the hypothesis of blending inheritance, the offspring of a black cat and a white cat would be GREY.  This theory is not now accepted.

Blending inheritance is an erroneous theory from the 19th century that proposed that offspring inherit phenotypic traits as 'average values' observed for such traits in their parents.

Mendel's laws of heredity (i.e., the Law of Segregation and the Law of Independent Assortment) showed that blending inheritance is based on erroneous concepts.

Moreover, incomplete dominance is an inheritance pattern different from blending inheritance because incomplete dominance refers to the observation that in certain traits both gene variants or 'alleles' are expressed in heterozygous individuals.

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If the first nucleotide after the promoter on the bottom DNA strand is changed from C to T, what would the resulting nucleotide be on the mRNA

Answers

I’m pretty sure it’s G U

When the DNA's C is changed to T, the corresponding nucleotide on the mRNA strand will be A (adenine) to maintain the complementary base pairing.

Nucleotides encode genetic information in DNA. Due to complementary base pairing laws, DNA sequence alterations impact mRNA transcript nucleotides. If the first nucleotide following the promoter on the bottom DNA strand changes from C (cytosine) to T (thymine), the matching mRNA strand nucleotide becomes A.

Because C pairs with G (guanine) in DNA and RNA. T in DNA matches A in RNA owing to complementary pairing. The DNA sequence will influence the mRNA sequence during transcription, which may impact the protein synthesised during translation.

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What are the little hairs that line the nasal cavity and help trap microorganisms?

Answers

Answer:

c. Cilia is correct

Explanation:

pls help

When new bonds form, energy is __________.


released


disconnected


gone


stored

Answers

Answer:

When new bonds form, energy is 'released'

What is a strength in the figure?

(1 point)

The figure shows structures in a cell.


The figure shows the steps involved in DNA replication.

The figure shows stem cell differentiation.

The figure shows where mitosis occurs in the cell cycle.

Answers

Answer:

The figure shows where mitosis occurs in the cell cycle

Explanation:

The strength in the figure is the figure shows where mitosis occurs in the cell cycle and the figure shows stem cell differentiation. Thus, option D is correct.

What is mitosis?

A cell prepares for cell division by replicating its chromosomes, segregating them, and creating two identical nuclei during the mitotic process. The cell's contents are typically evenly divided into two daughter cells with identical genomes after mitosis.

A cell copies each chromosome during mitosis and distributes one copy to each of its two daughter cells. With regard to our example of an instruction manual, it is crucial that each person receive a duplicate of each page.

Each chromosome must be delivered to each of our cells exactly once, without any errors, or the cells may have problems carrying out the genetic instructions.

Therefore, Mitosis occurs after G2 stage in the cell cycle.The strength in the figure is the figure shows where mitosis occurs in the cell cycle and the figure shows stem cell differentiation. Thus, option D is correct.

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If a person has just returned from a trip abroad and is feeling sleeping during daylight hours. What hormone and gland may be impacting this disruption

Answers

melatonin from the anterior pituitary gland!

What is global warming?:​

Answers

[tex] \bigstar \underline{ \large{ \sf{ \pink{Global \: \: Warming}}}} : [/tex]

▶ Global warming can cause sea levels to rise dramatically. In many places, coastal areas have already been flooded. Global warming could result in wide ranging effects on rainfall patterns, agriculture, forests, plants and animals. Majority of people living in regions which are threatened by global warming are in Asia. A recent climate change report gives us only a limited time to keep the greenhouse gases at the present level. Otherwise, the temperature may rise by more than 2 degrees Celsius by the end of the century, a level considered dangerous.

______________________________

glycolysis begins with _________ and ends with __________.

Answers

Answer:

Glycolysis starts with one molecule of glucose and ends with two pyruvate (pyruvic acid) molecules, a total of four ATP molecules, and two molecules of NADH.

Explanation:

Answer:

1 glucose molecule

2 pyruvic acid molecules

Explanation:

Glycolysis starts with 1 glucose molecule, which undergoes 4 stages until it splits into 2 pyruvic acid molecules. The products of this biochemical pathway include 2 NADH and 2 ATP molecules

Think back to the activity from the beginning of the lesson. After what you have
learned about substances and mixtures, how have your ideas changed?

Answers

Answer:

......what lesson....

Explanation:

would you mind clearing up the question a little

The main reproductive organ of the plant is the

Answers

Hello!!

                                                  .Stamen.

Structure. As a plant's reproductive part, a flower contains a stamen (male flower part) or pistil (female flower part), or both, plus accessory parts such as sepals, petals, and nectar glands (Figure 19). The stamen is the male reproductive organ. It consists of a pollen sac (anther) and a long supporting filament.

can you please give me brainliest

PLS HELP ME QUICK, Name and Title:
Include your name, instructor's name, date, and name of lab.


Objective(s):
In your own words, what was the purpose of the lab?


Hypothesis:
In this section, please include the if/then statements you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.


Procedure:
Complete your hypothesis (above).

Identify the independent (test) variable and the dependent (outcome) variable: __________________________

Practice using the computer model. Select each marker to see what it does. Here is a summary you can refer back to as you complete your experiment.
Carbon Dioxide Emissions Slider: You will use the arrows to change the amounts of carbon emissions.
Time Step Size: This will allow you to view the data every 5 years or every 10 years.
Start Over: Use this to reset the model if needed.

The current carbon emissions are 9.8 gigatons, or 9.8 billion tons. Complete all three scenarios to find out what happens to the global temperature if these emissions stay the same, decrease, or increase over the next century. Follow the instructions in the Data section of this report.

Data:
For each scenario, record the carbon dioxide emission rate and the global temperature. The data for the years 1960–2010 are already filled out for you.

Scenario One: Carbon dioxide emissions stay the same
Set the carbon dioxide emissions rate to 9.8 gigatons.
Set the time step size to 10 years.
Select step forward until you have the data through the year 2110.
Record the data in the table below.
Year Carbon Emissions (gigatons) Temperature (Fahrenheit)
1960 4.2 57.2
1970 5.8 57
1980 6.2 57.4
1990 7.8 57.6
2000 8 58
2010 9.8 58
Maintain carbon dioxide emissions at 9.8 for the rest of scenario one.
2020
2030
2040
2050
2060
2070
2080
2090
2100
2110
Scenario Two: Carbon dioxide emissions decrease
Set the carbon dioxide emissions rate to 9.8 gigatons.
Set the time step size to 10 years.
Select the step forward button once.
Decrease the carbon dioxide emissions by 0.2 and press step forward.
Continue stepping forward once, decreasing the carbon emissions each time, until you reach 2110.
Record the data in the table below.
Year Carbon Emissions (gigatons) Temperature (Fahrenheit)
1960 4.2 57.2
1970 5.8 57
1980 6.2 57.4
1990 7.8 57.6
2000 8 58
2010 9.8 58
Decrease carbon dioxide emissions by 0.2 each step forward for the rest of scenario two.
2020
2030
2040
2050
2060
2070
2080
2090
2100
2110
Scenario Three: Carbon dioxide emissions increase
Set the carbon dioxide emissions rate to 9.8 gigatons.
Set the time step size to 10 years.
Select the step forward button once.
Increase the carbon dioxide emissions by 0.2 and press step forward.
Continue stepping forward once, increasing the carbon emissions each time, until you reach 2110.
Record the data in the table below.
Year Carbon Emissions (gigatons) Temperature (Fahrenheit)
1960 4.2 57.2
1970 5.8 57
1980 6.2 57.4
1990 7.8 57.6
2000 8 58
2010 9.8 58
Increase carbon dioxide emissions by 0.2 for each step forward for the rest of scenario three.
2020
2030
2040
2050
2060
2070
2080
2090
2100
2110
Conclusion:
Use your data to answer the following questions. Use complete sentences, and be as detailed as possible.

Summarize how the carbon emissions affected the atmospheric temperature in each of the three scenarios:
Scenario One:
Scenario Two:
Scenario Three:


Was your hypothesis supported by your results or not? Explain how you know.

Explain the difference between the greenhouse effect and global warming.

Based on your knowledge of how the greenhouse effect works, why does the level of carbon dioxide affect the global temperature?

Name three sources of atmospheric carbon dioxide.
PLS HELP ME AM IN A HURRY

Answers

Answer:

Scenario One:

Scenario Two:

Scenario Three:

Was your hypothesis supported by your results or not? Explain how you know.

Explanation:

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