Biology High School

Students in Mr. Painter's science class studied samples of pond water using a microscope. To prepare for the experiment, the students placed a drop of pond water on each microscope slide, and then covered the drop with a cover slip that was marked with a 1 mm grid. Using the microscope to view the slides, students counted how many of each type of organism they found in each 1 mm square. Finally, each student calculated the total number of each type of organisms. Their data is shown below. Which organism is the least plentiful in the pond water studied? A. amoeba B. volvox C. euglena D. paramecium

Answers

Answer 1

Answer:

Euglena

Explanation:
the least plentiful organism in the pond water studied. Each student found fewer euglena than any other organism.

Related Questions


A topographic map is a two-dimensional model that uses contour lines to represent points of equal
1
barometric pressure
2
temperature gradient
3.
elevation above sea level
4
magnetic force

Answers

Answer:

3. elevation

Explanation:

Which of the following characteristics of Figure 1 best shows that the fragment is RNA and not DNA?
A
The 5' to 3' orientation of the nucleotide chain
B
The identity of each nitrogenous base
С
The charges on the phosphate groups
D
The type of bond linking the nucleotides together

Answers

Answer: I’m pretty sure it’s B

Explanation:

there is a uracil nitrogenous base in it and only rna has uracil whereas dna has thymine

If plant has the same amount of sunlight but less water, then the process of glucose would A- increase, B-decrease, C- stay the same

Answers

A because glucose comes from sunlight and can be produced into glucose
The answer is a

Good luck

True or False: Enzymes have an optimal or ideal pH level?

Answers

Answer:

All enzymes have an ideal pH value, which is called optimal pH. Under the optimum pH conditions, each enzyme showed the maximum activity. For example, the optimum pH of an enzyme that works in the acidic environment of the human stomach is lower than that of an enzyme that works in a neutral environment of human blood. All enzymes have an optimum pH that they work best at. Its often neutral pH 7, but not always.

Explanation:

i hope this is good?

PLEASE HELP ME Are humans predators in their ecosystem? Explain in at least 5 sentences.

Answers

Their new study shows that humans are strange predators. Unlike other animals, we target adult prey in large numbers. That is a practice that can push populations of those prey into decline, the researchers warn. People mainly target — at least among wild mammals and fishes — prey that are old enough to reproduce.

Humans are considered to be apex predators in their ecosystems due to their ability to manipulate and dominate other species through hunting, agriculture and urbanization.

Why are human predators?

Humans are considered to be apex predators in their ecosystem due to their ability to manipulate and change their environment to suit their needs. Humans have the ability to hunt and consume a wide variety of other organisms, including other predators. Humans also have a significant impact on the environment through activities such as deforestation, pollution, and hunting.

However, humans are also capable of acting as stewards of the environment and preserving biodiversity through conservation efforts. The relationship between humans and their ecosystem is complex and multifaceted.

Learn more about the ecosystem, here:

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The percentage of a hunter-gatherer society’s diet provided by hunting versus gathering was mostly determined by _______.
a.
the climate
b.
the types of prey
c.
hunting skill
d.
the size of the human population

Answers

the answer is B. the types of prey

Answer:

a. the climate

Explanation:


What is the law of conservation of matter? I​

Answers

Answer:

Matter can neither be created nor destroyed

Explanation:

Answer:that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change

Explanation:

easy apes question help pls

Answers

Answer:D

Explanation:

The asteroid would have caused sever heat in the atmosphere and elinate most of the water so i is severe climate change

Answer:

D : The asteroid would have caused sever heat in the atmosphere and elinate most of the water so i is severe climate change

Explanation:

1. The least reactive elements on the periodic table are the _____________ (high number of valence electrons)

2. What makes a reactive metal reactive?

3. What makes a nonreactive noble gas nonreactive?
These are all the questions I need help with (plzzz help mee)

Answers

Explanation:

1. the noble gases because they have a full valence shell

2.the amount of valence electrons

3. they have a full valence shell and dont need any more electrons

To become a virus, you only need 2 parts. One is Genetic Material or Genome (DNA or RNA) to
replicate it and the
or Protein Coat which protects the genome from digestive
enzymes. (Answer in lowercase) *

Answers

Answer: true

Explanation:

What two parts of a nucleotide do not change throughout the structure of DNA?

Answers

Answer:

The second portion of the nucleotide is the sugar. Regardless of the nucleotide, the sugar is always the same. The difference is between DNA and RNA.

Explanation:

thanks me and follow me

Five-carbon sugar (deoxyribose sugar) and phosphate moiety are the two parts of a nucleotide which do not change throughout the structure of DNA.

What are Nucleotides?

Nucleotides are the organic molecules which are consisting of a nucleoside molecule and a phosphate moiety. They serve as the monomeric units of the nucleic acid polymers- deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), both of which are the essential biomolecules within all the different life-forms on the Earth.

Nucleosides are made up of nitrogenous bases and pentose sugar. There are changes at the nitrogenous bases in the different nucleoside molecules however, there are no changes in the pentose sugar and the phosphate moiety of the molecule.

Learn more about Nucleotides here:

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How could you test your hypothesis?
Find the total mass of the water and the dry
pasta, then cook the pasta and measure the
mass of the cooked pasta and the water in
which it is being cooked.
Find the mass of the dry pasta, then cook the
pasta, drain it, and find the mass of the
cooked pasta.

Answers

Answer:

Explanation:

Find the total mass of the water and the dry pasta, then cook the pasts and measure the mass of the cooked pasta and the water in which it is being cooked.

It takes place when magma introduces
great amount of heat into an existing rock
resulting in the recrystallization and mineral
reaction in the rock.​

Answers

Answer:

The correct answer is - contact metamorphism.

Explanation:

Contact metamorphism is one of the two metamorphism processes which takes place when the pre-existing rock is introduced to a great amount of heat which affects it by an intrusion of magma. It is known as a low pressurized, high-temperature type of metamorphism.

An example of this type of metamorphism which experiences recrystallization in the rock and forms a metamorphic marble that is formed by the recrystallization and mineral reaction of the limestone.

What is a function of the respiratory system?

Answers

Answer:

The respiratory system's main purpose is to move fresh air into your body and moving waste gasses out (like carbon dioxide when you breathe out)

The function of the respiratory system is to inhale oxygen which is absorbed by red blood cells in the lungs. The RBC then go to the heart which pumps the oxygenated blood to the rest of the body and non oxygenated blood goes back to lungs to be oxygenated. They also carry back waste such as carbon dioxide to the lungs to be exhaled.

Choose all the answers that apply.

Muscles in the small intestine are _____.

smooth
striated
involuntary
voluntary
cardiac
Pls pick multiple

Answers

Answer:

smooth and involuntary

Two layers of smooth muscle form the small intestine. The outermost layer is the thin, longitudinal muscle that contracts, relaxes, shortens, and lengthens the gut allowing food to move in one direction. The innermost layer is a thicker, circular muscle.

Also smooth muscle is not under our control so is called involuntary


Write the complementary RNA strand to the following DNA sequence: 5'ACGTAC 3'

Answers

3’ UGCAUG 5’
hope this helps!

Large molecule formed when many smaller molecules bond together are called
metabolism
enzyme
solution
polymer

Answers

Answer:

The answer is Polymer

Help please! thanks this due today!!!! :)

Answers

Answer:

Just shape the pigeon with cardboard than paint it!

Explanation:

Hope this helps have a great night!

I NEED HELP ASAP!! will be willing to mark you brainliest!
Answer Q1-7 using the food web pictured below.
1. How many food chains make up the food web?



2. Which organism is an herbivore?



3. Which organism is an autotroph?



4. Which organism is a third-order heterotroph? To what trophic level does that organism belong?



5. Which organism is an omnivore?



6. Which organisms belong to more than one food chain?



7. Which organism belongs to more than one trophic level?

Answers

1. 6

2. insect

3.plant

4.snake

5. snake

6. plant

7. bird

hope this helps, sorry if i got any wrong

How do scientists find the epicenter of an earthquake?

Answers

Scientists use triangulation to find the epicenter of an earthquake. When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects.


DNA Polymerase makes a copying error in a gene and an additional base
gets put into that gene. Which of the following is the most reasonable
result? *
1. The codons on the mRNA transcript contain an extra base which causes the amino
acid chain to not make the desired protein.
2. This causes RNA polymerase to transcribe the gene backwards.
3. The causes RNA polymerase to not recognize the gene and therefore no transcription
takes place.
4. The RNA polymerase recognizes extra bases and won't transcribe them.

Answers

Answer:

1. The codons on the mRNA transcript contain an extra base which causes the amino

acid chain to not make the desired protein.

Explanation:

Then error will make it not to produce the required output

pls like

please answer this for me

Answers

Answer:

Plants

Explanation:

In plant cells, the vacuoles are much larger than in animal cells

Using f(x) = 3x + 4 find f(3)

Answers

Answer:

f(3)=13

Explanation:

f(x)=3x+4

f(3)=(3x3)+4

f(3)=9+4

f(3)=13

How do i know if its entering or leaving or neither just by the precentage?

Answers

Answer:

1. Shrink

2. Swell

3. Neither

Explanation:

The percentage of water indicates how pure the water is, i.e. how concentrated the molecules of water are.

The higher the percentage of water, the more water molecules there are in the space.

Water molecules move from a high concentration to a low concentration across a semi permeable membrane, by the process of osmosis.

In beaker 1, the water outside is 89%, and inside the bag is 92%. That means the water inside the bag is at a higher concentration than outside. That means water will leave the bag, moving from a high concentration to a lower concentration outside. The bag will shrink.

In beaker 2, the water outside is 97%, and inside is 92£%. That means the water inside the bag is a lower concentration than outside. That means water will enter the bag, moving from a higher concentration outside to a lower concentration outside. The bag will swell.

In beaker 3, the concentration of water inside and outside is the same. That means they are in an equilibrium (the movement is balanced) so neither will occur

Is this right? NEED HELP ASAP

Answers

Answer:

They all seem to be correct, good job!

Answer:

Correct

Explanation:

pls help will mark brainliest.
Answer Q1-7 using the food web pictured below.
1. How many food chains make up the food web?



2. Which organism is an herbivore?



3. Which organism is an autotroph?



4. Which organism is a third-order heterotroph? To what trophic level does that organism belong?



5. Which organism is an omnivore?



6. Which organisms belong to more than one food chain?



7. Which organism belongs to more than one trophic level?

Answers

Answer:

1) 3

2) Insect

3) Plant

4) Snake; 3rd

5) bird

6) All of them

7) bird

Explanation:

Which cell structures are correctly paired with their functions?

Answers

Answer:

C is the answer. There are single-celled organisms that are considered a living thing. The others are all true about the cell.

Explanation:

Hoped this helped.

Is ATP used for long term storage?

Answers

Answer:

No

Explanation:

ATP is not used for long term storage.

ATP will release or give off energy when it releases a phosphate molecule. Since a cell can add or subtract a phosphate group, it has a way of storing and releasing energy. Most cells have only a small amount of ATP. It can't be used to store energy for long periods of time. These ATP stores last only a few seconds after which the breakdown of PC provides energy for another 5-8 seconds of activity. Combined, the ATP-PC system can sustain all-out exercise for up to 10-15 seconds and it is during this time that the potential rate for power output is at its greatest. These ATP stores last only a few seconds after which the breakdown of PC provides energy for another 5-8 seconds of activity. Combined, the ATP-PC system can sustain all-out exercise for up to 10-15 seconds and it is during this time that the potential rate for power output is at its greatest. Hence, ATP cannot be stored easily within cells, and the storage of carbon sources for ATP production (such as triglycerides or glycogen) is the best choice for energy maintenance. Lipids are molecules that can be used for long-term energy storage. Most cells have only a small amount of ATP. It can't be used to store energy for long periods of time. It is more efficient for a cell to keep a small supply of ATP. Cells can regenerate ATP from ADP as needed by using the energy in carbohydrates like glucose. The ATP molecule is just like a rechargeable battery. When it's fully charged, it's ATP. When it's run down, it's ADP. However, the battery doesn't get thrown away when it's run down–it just gets charged up again. Living organisms use two major types of energy storage. Energy-rich molecules such as glycogen and triglycerides store energy in the form of covalent chemical bonds. Cells synthesize such molecules and store them for later release of the energy. Monosaccharides
Monosaccharides contain just one sugar unit, so they're the smallest of the carbohydrates. (The prefix "mono-" means "one.") The small size of monosaccharides gives them a special role in digestion and metabolism. In a process called cellular respiration, chemical energy in food is converted into chemical energy that the cell can use, and stores it in molecules of ATP. ... When the cell needs energy to do work, ATP loses its 3rd phosphate group, releasing energy stored in the bond that the cell can use to do work.

discuss the problems which farmers face who cultivate crops on hilly or mountainous areas

Answers

Answer:

The soil getting washed away

Explanation:

No one ever helps me it would be nice if someone did , please give me the correct answer it’s easy :(

Answers

Answer: C

Explanation: bc the fertilizer is the toxic chemical

Answer:

it is most likely C, all the other choices seem redundant

Explanation:

Other Questions
If n is divisible by 2, 5 and 14, which of the following is also divisible by these numbers? TIMED HELP PLS How many calories are there in every gram of fat? if you have 2 red balloons and 4 blue balloons what is the ratio of the balloons if you add 3 red ones and subtract 1 blue one what is the ratio Which scene from the plot's resolution helps express a theme developed in Julie of the Wolves?Miyax's fight with Jellothe reunion of Miyax and KapugenMiyax's arrival in BarrowAmaroq's acceptance of Miyax pls help ill give brainliest to first answer Is crumbling sheet of paper physical or chemical change and why! Pls help fast!!!! :(( This stemmed from the belief that God created the universe but assumed no control allowing man that power, or _____. What are some ways your body regulates the increase of body temperature that also occurs when exercising? One atom of carbon _____.has four electron shellsis part of all inorganic compoundsforms a special shape called a tetrahedroncan bond with up to four other atoms On June 30, 20X1, a tornado damaged Jensen Corporations warehouse and factory, completely destroying the work-in-process inventory. Neither the raw materials nor finished goods inventories were damaged. A physical inventory taken after the tornado revealed the following valuations: Raw materials $87,000 Work-in-process 0 Finished goods 151,000 $238,000 The inventory of January 1, 20X1, consisted of the following: Raw materials $41,000 Work-in-process 128,000 Finished goods 173,000 $342,000 A review of the books and records disclosed that the gross profit margin historically approximated 28% of sales. The sales total for the first six months of 20X1 was $405,000. Raw material purchases totaled $150,000. Direct labor costs for this period were $112,000, and manufacturing overhead has historically been applied at 50% of direct labor. Required: Compute the value of the work-in-process inventory lost at June 30, 20X1. PART 1Whoever wishes to investigate medicine properly, should proceed thus:in the first place to consider the seasons of the year, and what effectseach of them produces for they are not at all alike, but differ muchfrom themselves in regard to their changes. Then the winds, the hotand the cold, especially such as are common to all countries, andthen such as are peculiar to each locality. We must also considerthe qualities of the waters, for as they differ from one another intaste and weight, so also do they differ much in their qualities.In the same manner, when one comes into a city to which he is a stranger,he ought to consider its situation, how it lies as to the winds andthe rising of the sun; for its influence is not the same whether itlies to the north or the south, to the rising or to the setting sun.These things one ought to consider most attentively, and concerningthe waters which the inhabitants use, whether they be marshy and soft,or hard, and running from elevated and rocky situations, and thenif saltish and unfit for cooking; and the ground, whether it be nakedand deficient in water, or wooded and well watered, and whether itlies in a hollow, confined situation, or is elevated and cold; andthe mode in which the inhabitants live, and what are their pursuits,whether they are fond of drinking and eating to excess, and givento indolence, or are fond of exercise and labor, and not given toexcess in eating and drinking. ----------------------------------------------------------------------PART 2From these things he must proceed to investigate everything else.For if one knows all these things well, or at least the greater partof them, he cannot miss knowing, when he comes into a strange city,either the diseases peculiar to the place, or the particular natureof common diseases, so that he will not be in doubt as to the treatmentof the diseases, or commit mistakes, as is likely to be the case providedone had not previously considered these matters. 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What is the change in the river's height after one week? What was housed on the second floor of the Old State House during the 1700s? A. The Royal Court B. The Supreme CourtC. The District Court D. The Boston Court Please help this is due in 5 mins Based on illustrations of magnetic field lines, where could an object be placed so it would not experience a magnetic force? halfway between the like poles of two magnets, because the field lines bend away and do not enter this area halfway between the opposite poles of two magnets, because the field lines are the closest together above the middle of a bar magnet, because the magnetic field lines are only found around the sides of the magnet above a pole of a bar magnet, because the magnetic field lines either go in or go out at the end