what is the substance found in cell walls of diatoms

Answers

Answer 1

Answer: opaline silica

Explanation:

Answer 2
Opaline silica
Diatoms are single called algae

Related Questions

Will mark brainliest also will give 50 points

What is the half set of chromosomes in gametes?

A. Zygote
B. Fertilization
C. Diploid
D. Haploid

Answers

Answer:

Diploid

Explanation:

Gametes contain half the chromosomes contained in normal diploid cells of the body, which are also known as somatic cells. Haploid gametes are produced during meiosis, which is a type of cell division that reduces the number of chromosomes in a parent diploid cell by half!

Answer:

diploid

Explanation:

I think, it's been a few years since I took biology but I hope it's right

And you choose this answer?

Answers

The answer is B. Amino Acids

Researchers collected data about the heart rates of
humans aged 5 to 90 years. They represented the data in a
graph.

Which statement is the best explanation of the pattern in the data?

A. The data show that increasing age causes an increase in heart
rate
8. The data show neither correlation nor cause between age and heart rate

C. The data show a correlation between age and l

D. The data show cause but not correlation between age and heart
rate

Answers

The statement 'the data show a correlation between age and heart rate' is the best explanation of the pattern in the data (Option C).

What are causation and correlation?

Causation means that a given outcome (i.e, the independent variable, in this case age) may lead to a modification the dependent variable (in this case the hearth rate), whereas correlation indicated a relationship between variables.

In conclusion, the statement 'the data show a correlation between age and heart rate' is the best explanation of the pattern in the data (Option C).

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If a DNA molecule is 10% Adenine (A), what percent of the DNA molecule
is made up of Cytosine (C)? (Hint: remember the base pairing rules)
related set of

Answers

If a DNA molecule is 10% Adenine (A), 40% of the DNA molecule

is made up of Cytosine (C)

The DNA composition ratio can be calculated by Chargaff's rule which states that, Guanine and cytosine should both be present in equal amounts in the DNA of every species and organism, while adenine and thymine should both be present in equal amounts. Additionally, there should be a 1:1 stoichiometric ratio between the purine and pyrimidine bases (A+G=T+C).

As per the Question,

If, A=10 then T=10 because A always pair with T. If T=10, then G=40, and then C=40. The total sum is equal to 100 or A + G (10 + 40) = T + C (10 + 40). Which ratio is equal to 1:1.

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How would you know when homeostasis has been reached in your egg and syrup system?

Answers

The egg and syrup system

because the egg membrane is semi-permeable, water can flow in however proteins can not flow out. If a egg is positioned in the corn syrup the egg will shrink. this is also because of osmosis, but inside the opposite direction. The corn syrup is more often than not sugar.

What takes place whilst you go away an egg in water for twenty-four hours?

depart the egg within the water for 24 hours. The water will migrate from the side of the membrane wherein water molecules are abundant (outside the egg) o the side where water molecules are less considerable. After 24 hours, the egg will be plump once more.

What takes place whilst you positioned an egg in vinegar then corn syrup?

as the vinegar reacts with the eggshell, bubbles surround the egg, inflicting it to waft. while the egg is placed in the salt water, it sinks to the lowest of the beaker again, considering the fact that it's miles greater dense than the salt water solution. The egg floats inside the corn syrup due to the fact the corn syrup is extra dense than the egg.

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Someone picks up a card that has 2 carbohydrate molecules that are bonded on it and asks "excuse me, but I think you dropped your name tag?

what is the joke here?​

Answers

Explanation:

YAA! its a joke I laughed like Hell!

I don't understand what's the Joke in this..

The type of cartilage found at end of bones articulating to form joints is

Answers

Answer:

That would be Hyaline cartilage. A smooth type of cartilage that helps bones move or glide over one another.

Answer:Bone marrow

Explanation: it is what keeps the bones strong and together

Which of the following is a reliable way to observe that a chemical change has occurred when two substances come in contact with one another?

Answers

The ways to observe that a chemical change has occurred when two substances come in contact with one another are as follows:

Color Change.Production of an odor.Change of Temperature.Evolution of a gas (formation of bubbles)Precipitate (formation of a solid)

What is a chemical change?

A chemical change is a any process in which reactants are changed into products by the breaking or creation of chemical bonds.

A chemical change is opposed to a physical change in the sense that a physical change affects only the form of a chemical substance, but not its chemical composition.

The ways to observe if a chemical change has occured are as follows:

Color Change.Production of an odor.Change of temperature.Evolution of a gas (formation of bubbles)Precipitate (formation of a solid)

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Answer:

(Question) Which of the following is an example of only a physical change?

(Answer) dry ice becoming vapor

(Question) Which of the following demonstrates a chemical change?

(Answer) iron (Fe) reacting to water((H2O)) and oxygen(O) to form iron oxide(Fe2O3)

(Question) Which of the following is a reliable way to observe that a chemical change has occurred when two substances come in contact with one another?

(Answer) conduct a test to determine the chemical makeup of the molecules

(Question) Which of the following happens during a chemical change but does not happen during a physical change?

(Answer) Atoms of one or more substances rearrange into a new substance.

(Question) Which of the following example demonstrates the reversibility of a chemical change?

(Answer) recharging batteries

Explanation:

i just finished the quick check. enjoy

What do buffers do and why are they important in biological systems

Answers

Organic acids that are end products of metabolic reactions, protein catabolism, and other biologically active molecules are continually being produced in living organisms. Maintaining the pH in intra- and extracellular fluids is essential since it influences the biological activity of proteins, enzymes, hormones, the distribution of ions through membranes, etc... The way in which we can regulate the pH within of the limits compatible with life are: 1) physiological buffers and 2) the elimination of acids and bases by respiratory and renal compensation.

Explanation:

A buffer is a solution that can resist pH change upon the addition of an acidic or basic components. It is able to neutralize small amounts of added acid or base, thus maintaining the pH of the solution relatively stable. This is important for processes and/or reactions which require specific and stable pH ranges. Buffer solutions have a working pH range and capacity which dictate how much acid/base can be neutralized before pH changes, and the amount by which it will change.

dont answer if you ont know it

The more bonds an atom can make, the more likely it is to combine with other atoms in different ways.


Which element is most likely able to make the greatest variety of bonds?


nitrogen

hydrogen

oxygen

carbon

Answers

Answer:

hydrogen

Explanation:

this is because hydrogen has a valency of 1 and has only one electron in it's outer most energy level thus able to bond with many elements easily

Which of the answers is correct about atoms?

Answers

Answer:

A. at the center of the atoms are the electrons

Explanation:

An atom itself is made up of three tiny kinds of particles called subatomic particles: protons, neutrons, and electrons. The protons and the neutrons make up the center of the atom called the nucleus and the electrons fly around above the nucleus in a small cloud.

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Explain how water cycles globally

Answers

Explanation:

Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow. Water in different phases moves through the atmosphere (transportation).


Consider the results of Ostfeld et al. 2018 paper. What type of forest is most likely to have a high
predators?
A site in a mostly maple forest.
B site surrounded by less than 1 kilometer of forest.
C site surrounded by at least 1 kilometer of forest.
D site in a mostly oak forest.

Answers

the answer is C, i just took answered the question

According to the result of Ostfeld et al., the type of forest that is most likely to have high predators is the site surrounded by at least 1 kilometer of the forest. Thus, the correct option for this question is C.

What do you mean by Predators?

Predators may be defined as the type of animals/organisms that primarily obtains food by killing and hunting other organisms and finally consuming them. In a more simple sense, predators may be characterized as an animal that naturally preys on others.

The results of Ostfeld et al. 2018 paper, the area that is surrounded by at least 1 kilometer of the forest is known as the zone of predators, where a high number of predators are found. This is because in this region predators got an extremely good amount of food with less expenditure of energy.

Therefore, the correct option for this question is C.

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Students set out five bird feeders, each of a different color:
red, blue, green, yellow, or brown.
Assuming that birds have no color preference, what is the theoretical
probability that a visiting bird will go to the blue feeder?
A. 1.0
B. 0.2
C. 0.4
D. 0.5

Answers

Assuming that birds have no color preference, the Probability that a visiting bird will go to the blue feeder is 0.2 (20%)

B. 0.2

How is probability calculated?

The probability is calculated using a simple division. Just divide the number of events by the number of possible outcomes, as seen in the formula

p = n(e)/n( Ω ).

With this information, we can conclude that To determine the probability that z is between two given values, determine the cumulative areas for each value, then subtract the smaller from the larger. To determine the probability that z is less than a given value, find the corresponding accumulated area.

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explain why it is important to keep the levels of nucleotides relatively balanced in the context of dna and rna synthesis

Answers

Answer:

Read Below

Explanation:

Nucleotides are A & T and G&C you see in DNA and in RNA T is Replaced by U. The reason they must be balanced between G&C and T&A is because G has to bond with A in DNA and G with C so if there is more G than C that means there is mismatches between the DNA nucleotides same thing for A and T. In RNA you follow the same rule. If we have lets say 27% of our DNA as A we have to have 27% as T leaving 23% as C and 23% as G. If there was lets say 29% T while one 27% A then there was a error in DNA replication and could lead to errors in RNA synthesis if not corrected

Why can two people draw different phylogenic trees using the same data and still both be correct?

Answers

The most common misinterpretation that does not change the result is related to taxa relatedness is to use the distance between taxa in phylogenetic trees to determine relatedness, i.e., the proximity of branch tips, often referred to as “tip reading”. Branches can be rotated around nodes, however, so that the positions of taxa are arbitrary.

What is phylogenetic tree?

A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.

What is the advantage of a phylogenetic tree?

It helps us to understand how species are related to each other. The evolution of animal species has been prolific (the estimates go into the millions and tens of millions).

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2. Mammary glands are shared characteristic among mammals and the oldest common ancestor of mammals. This is an example of a
O A. cladogram.
O B. synapomorphy.
O c. taxonomy.
O D. phylogeny.

Answers

Answer: B

Explanation:

Your answer is B and synapomorphy

Which statements accurately describe animals? Check all that apply.
-All animals are prokaryotes.
-All animals are multicellular.
-All animal have cells that contain a nucleus and organelles.
-All animals are capable of asexual reproduction
-All animals must maintain stable internal conditions.
-All animals stay in one place throughout their lifetime.
-All animals make their own food.

Answers

All animals are multicellular.

All animal have cells that contain a nucleus and organelles. These two are the correct statements.

Animals have a huge variety of characteristics that set them apart from species in other kingdoms, despite the fact that they all belong to the animal kingdom. The vast majority of animals have specialized tissues, and all animals are eukaryotic, multicellular organisms. The majority of animals are mobile, at least at some points in their lives. Animals need nourishment in order to thrive and grow. Every animal is heterotrophic, meaning they consume both live and dead organic stuff. They differ from autotrophic creatures like most plants, which produce their own nutrition through photosynthesis, and from fungi, which externally digest their food, in that they receive energy in this manner. Animals can be parasitic, herbivorous, carnivorous, or omnivorous.Most animals reproduce sexually, and unlike plants, the young go through a sequence of developmental stages that shape their body plans.

Therefore, all animals are multicellular and have cell organelles.

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What type of transport occurs when a large cell contains a smaller cell such as a bacteria

Answers

A large cell contains a smaller cell like bacteria due to phagocytosis.

Bacteria are the microorganisms that are the most primitive on earth. These are omnipresent. Bacteria can be both harmful as well as useful. The bad bacteria cause several diseases whereas the good bacteria help in digestion, nitrogen fixation, curdling of milk, etc.

Phagocytosis is a type of endocytosis. It is also called cell-eating. In phagocytosis, cell engulfs solid large bacteria completely. This is done by forming extensions of the plasma membrane called pseudopodia. These pseudopodia then fuse and pinch off to form endocytic vesicles. Organisms like amoeba perform phagocytosis, and human immune cells too.

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Describe digestion in the small intestine and large intestine

What are villi and microvilli? What are their funcrions

Answers

Answer:

Villi and microvilli are both membranous structures that help facilitate the exchange of materials out and in the cell.

Explanation:

Since they are threadlike projections it increases the surface area while decreasing the volume (that's really good for any cell!). So they both indeed make the exchange of fluids and other materials easier.

please help me

is the my daughter ​

Answers

Answer: I think it’s D,C, and A.

Explanation:

11 is D and 13 is A!

science is based on facts not options.

-an ______ is a statement that expresses feelings or beliefs.

-facts on the other hand ,are statements that can be proved true. supported with _____

fill in the blanks.​

Answers

Answer:1 is opinion

2is evidence.

Explanation:

Answer:

the first one is "opinion"

the second one is "facts"

Write a paper that outline the adaptations of carnivorous plants ( see pp.91-92 of evolutionary analysis). Use Gibson and waller 2009) to summarize specifically how “ snap-trap” may have evolved from “flypaper” trap by natural selection .adderess the pertinent principles of natural selection found in chapter 3 of envolutionary Analysis .A link to this paper is found on the blackboard site for this couse

Answers

Answer:

1 adaptation of carnivorous plant is this

Trapping Their Prey

Common trapping techniques are pitfall traps, flypaper traps, snapping traps, and suction traps. The first two use adaptations that involve shape and sticky surfaces. The last two are particularly fascinating, because the presence of prey triggers the plant to take action — to move, quickly!

Water can enter the skin cells of a dead body placed in water, due to passive transport.

True
False

Answers

The statement indicating that water can enter the skin cells of a dead body placed in water, due to passive transport is TRUE.

What is passive transport?

Passive transport refers to the movement of substances in favor of a concentration gradient through a membrane, and osmosis is a type of passive transport by which water (H2O) molecules move through a membrane in favor of this gradient.

In conclusion, the statement indicating that water can enter the skin cells of a dead body placed in water, due to passive transport is TRUE.

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Choose the right answers

Answers

Answer:

1st, 2nd and Last option

Explanation:

The number of protons is equal to its atomic number. Neutral atom means that the charge in the atom is 0. In order to make the charge 0, the proton and electron charges have to be additive inverses, meaning the sum of the proton and electron charges have to be 0. Each proton has a +1 charge while each electron has a -1 charge. Hence, the number of protons and electrons have to be equal.

9.) What is an emergent property?​

Answers

Answer:

here

Explanation:

properties that become apparent and result from various interacting components within a system but are properties that do not belong to the individual components themselves.

Two chemicals were placed in a container and a chemical reaction occured. The container became hot at the end of the reaction.
what kind of chemical reaction had happened ?

Answers

Answer:exothermic

Explanation:

the reaction gave off heat which means energy was leaving we leave through exits so it was exothermic

1) What is the difference between spectroscopy and spectrometry?

2) Why is it necessary to use a narrow wavelength spectrum of light in spectrometry? Why do we use wavelengths of peak absorbance for a particular analyte?

3) What volume of a 100 ppm (part per million) stock solution would be used to create 30 mL of a 10 ppm standard?

Answers

Spectroscopy refers to the interaction of matter with energy.

What is spectroscopy?

The term spectroscopy refers to the interaction of matter with energy. It shows the manner in which matter is able to interact with energy. Spectrometry is the application of spectroscopy.

It is important to use a narrow wavelength during spectroscopy because different wavelengths can be used to identify the various kinds of compounds in the sample.

The dilution formula could be used to obtain the new concertation of the solution  after dilution. An aliquot of the stock  solution is added to a measured volume of water and made up to the required mark for dilution.

Using the dilution formula;

C1V1 = C2V2

C1 = 100 ppm

V1 = ?

C2 = 10 ppm

V2 = 30 mL

V1 = C2V2/C1

= 10 ppm * 30 mL /100 ppm

V1 = 3 mL

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Which of the following is NOT an example of homeostasis?

a
During rigorous exercise the heart rate increases to deliver more blood to the cells.
b
As humans age, they become more susceptible to disease and cancer.
c
When blood glucose is high, the hormone insulin reduces blood glucose.
d
When body temperature rises, nerve impulses cause sweat glands to release more sweat.

Answers

Answer:

d

Explanation:

When body temperature rises, nerve impulses cause sweat glands to release more sweat

B ; As you age, your homeostasis deteriorates. Getting sick does not mean the same as fighting of things in the body which is what homeostasis does!

How is it possible for a woman to produce several eggs at one time

Answers

Answer:

women cannot produce eggs

Explanation:

they produce baby

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