Answer:
because different cell types can perform different functions
DNA is often compared to a twisted ladder. In this analogy, what forms the
rungs of the DNA ladder?
A. Pairs of nitrogenous bases
B. Pairs of nucleotides
C. Pairs of sugars
D. Pairs of phosphate groups
The pairs of nucleotides result in the twisting of strands. Therefore, option "B" is correct.
What is nucleotide base pairing?There are five types of nucleotide bases adenine, cytosine, guanine, thymidine, and uracil. These divide into two classes of nucleotides pyrimidine and purine nucleotide bases. Pyrimidines are uracil, thymine, and cytosine whereas adenine and guanine are purine.
In RNA, adenine, cytosine, and guanine are present but thymine is replaced by uracil. Pyrimidine always binds with the purines through hydrogen bonding. Adenine binds with thymine. Cytosine binds with guanine. But when adenine pairs with uracil in RNA.
Therefore, nucleotide base pairing determines the twisting of the DNA strand depending on the type of nucleotide present.
Learn more about nucleotides, here:
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what does cytoplasm do
Answer: What does cytoplasm do
Explanation:The cytoplasm holds the components of the cell and protects them from damage. It stores the molecules required for cellular processes and is also givies the cell its shape.
Answer:
The cytoplasm is responsible for holding the components of the cell and protects them from damage. It stores the molecules required for cellular processes and is also responsible for giving the cell its shape.
The 3 major functions of cytoplasm:
The cytoplasm support and suspend organelles and cellular molecules. Many cellular processes also occur in the cytoplasm, such as protein synthesis, the first stage of cellular respiration (known as glycolysis), mitosis, and meiosis. The cytoplasm helps to move materials, such as hormones, around the cell and also dissolves cellular waste.TIME REMAINING
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What is natural selection?
O a process that selects variations that help with survival and that spreads the variations to more offspring
a process through which nature selects an individual within a population for extinction
a process that causes all populations to gradually increase in size
O a process that causes random variations to appear in the offspring of every generation
Answer:
a
a process that selects variations to help with survi al and that spreads the variation to more offspring
Explanation:
the weak don't survive the strong thrive
Water seeps inside cracks in a boulder and freezes. Over time, the cracks expand and the boulder breaks in half. What process caused this change in the rock?
Answer:
it may be erosion, I'm not quite sure but it could possibly be a form of erosion.
Which of the following is an example of a tissue?
A. Lung
B. Digestive tract
C. Bone
D. Heart
Answer:
C. Bone
Explanation:
because it is made up cells.
The other objectives are organs.
state the general name for plants that live in,and are adapted for,dry conditions.
Answer:
Succulents
Explanation:
They have a thick waxy cuticle so that water vapour does not escape easily
Some have thornes so they are not eaten by animals
There roots are very wide and shallow so that they can absorb water from the surface quickly after it rains
Their stomata open at night so that too much water vapour cannot diffuse into the air
Answer:
Plants that are adapted to very dry environments are called xerophytes
Explanation:
please follow me and paki brainlest my answer thank you pre :)
Based on this information, what type of transport is used for glucose in blood and intestinal cells?
Answer:
Facilitative glucose transporters (GLUTs)
These are responsible for the bidirectional transport of glucose in tissues and cells. This involvesusing facilitative diffusion to carry glucose down a concentration gradient, into the cell.
Responda con verdadero (V) o falso (F), según corresponda. En caso de falso, justifique su respuesta. Todas las células poseen pared celular Las células procariotas se originaron hace 1.500 millones de años aproximadamente_____ Los centriolos son organelas cilíndricas, formadas por proteínas, que intervienen en la división celular____ El ADN determina las características de un organismo____ En las mitocondrias se produce la digestión celular_____ En la definición de célula, la palabra estructural, hace referencia a cómo funciona la célula_____ La palabra Eucariota quiere decir "verdadero núcleo"____
Answer:
Falso
Falso.
Cierto
Cierto
Falso
Falso
Cierto.
Explicación:
Todas las células no tenían pared celular. Sabemos que la célula animal es un tipo de célula que solo tiene membrana celular. Las células procariotas se originaron hace aproximadamente 3,5 mil millones de años. Los centríolos son orgánulos cilíndricos, formados por proteínas, que contribuyen en la división celular. El ADN determina las características de un organismo porque el ADN tiene toda la información sobre los organismos. La digestión celular no ocurrió en las mitocondrias. El lugar de la digestión celular son los lisosomas. En la definición de celda, la palabra estructural, se refiere a la composición y forma de la celda. La palabra eucariota significa "núcleo verdadero" y núcleo verdadero significa que la membrana rodea al núcleo.
Complete the following sentence.
__________ is the science and practice of growing gardens.
Answer:
Horticulture is the science and practice of growing gardens.
Explanation:
An object is placed at 0 on a number line. It moves 3 units to the right, then 4 units to the left, and then 6 units to the right. What is the displacement of the object?
Answer:
5
Explanation:
Distance is how far something goes and Displacement is how far it is from 0 or from the starting point. Additionally, displacement is a vector so it has a direction, in this case, left or right. To make this shorter let's just find displacement. So you're at 0 and you go 3 units to the right and so you're at positive 3 on the line. Next, you move 4 units to the left so now you're at -1. Finally, you move 6 units to the right and now you're at postive 5. Now you're +5 units away from 0 and so +5 is your displacement (5 units to the right is also correct)
Answer: +5 units or 5 units to the right (as long as it has a sign or a direction it's correct)
What is the function of histamine in inflammation
(Will mark as brainliest)
Answer:
Histamine increases the vasodilatation, and also increases the vascular permeability in the immediate transient phase of the acute inflammatory reaction. This histamine also acts as a chemical mediator in acute inflammation. The receptors of histamine is also involved in acute inflammatory reaction .
The phenotype frequency in a populatin changews after each generation which would most likely be cause this
Can someone help me with Earth Science, please? I'll really appreciate it.
1. Describe some surface mining methods.
2. What are some ways an area can undergo reclamation after being mined?
3. What makes a gemstone valuable?
4. How is an atom different from an ion? How is an atom different from an element?
5. How is a molecule different from an element? Can a molecule be an element?
6. In which type of bonding are electrons shared? In which are they given or taken? Which type of bond is stronger?
7. What is a crystal?
8. What are the eight major mineral groups?
9. How does the native elements mineral group differ from all of the other mineral groups?
10. Which properties of a mineral describe the way it breaks apart?
11. Apatite scratches the surface of an unknown mineral. Which mineral would you use next to test the mineral’s hardness—fluorite or feldspar? Explain your reasoning.
12. What is the difference between magma and lava?
13. Explain how mineral veins form.
Answer: 1:There are five recognized types of surface mining, each with specific variations depending on the minerals being extracted. These include strip mining, open-pit mining, mountaintop removal, dredging and highwall mining.
2:Refilled/reshaped w/vegetation planted; filled w/water to become a lake; turned into landfill; left open as home for bats or sealed off if underground.
3:Physical characteristics that make a colored stone valuable are color, clarity to a lesser extent (emeralds will always have a number of inclusions), cut, unusual optical phenomena within the stone such as color zoning (the uneven distribution of coloring within a gem) and asteria (star effects).
4:Atoms where the electrons and protons are not equal are called ions. Ions are charged particles. They can be either positively charged ions or negatively charged ions.
5:Molecule is a substance with two or more atoms bonded together such as the oxygen humans breathe (O2). Elements are pure substances made up of all the same atoms such as gold (Au), hydrogen (H), and oxygen (O). Elements all have the same number of protons in their nuclei and can't be broken down.
6:A covalent bond involves electrons being shared between atoms. The most stable state for an atom occurs when its valence electron shell is full, so atoms form covalent bonds, sharing their valence electrons, so that they achieve a more stable state by filling their valence electron shell.
7:A crystal or crystalline solid is a solid material whose constituents are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.
8:How does the native elements mineral group differ from all of the other mineral groups? Native elements contain atoms of only one type of element. Only a small number of minerals are found in this category. Some of the minerals in this group are rare and valuable.
9:How does the native elements mineral group differ from all of the other mineral groups? Native elements contain atoms of only one type of element. Only a small number of minerals are found in this category. Some of the minerals in this group are rare and valuable.
10:Cleavage. The way in which a mineral breaks along smooth flat planes is called cleavage. These breaks occur along planes of weakness in the mineral's structure. However, if a mineral breaks along an irregular surface, it does not have cleavage.
11: I would use fluorite to test the hardness because apatite has a higher hardness then fluorite does mean that the unknow mineral is lower on the hardness test then both apatite and feldspar. 5. Why is streak more reliable than color when identifying a mineral?
12:magma for molten rock that is underground and lava for molten rock that breaks through the Earth's surface.
13:In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock. Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through precipitation. The hydraulic flow involved is usually due to hydrothermal circulation.
Explanation:
plz can anyone write an essay about water pollution about 1300 words
Answer:
Explanation:
The biological or chemical change in the quality of water due to the presence of contaminants in water is called water pollution. Most of this contamination as on date is due to various human activities. In fact, humans are responsible for the mass deaths of whales and other aquatic organisms often swept ashore at different beaches in the world. There is an urgent need to look into the measures to control water pollution although a lot many efforts and schemes have already been announced by the Government in this regard. To make the students aware of this we have prepared short and long essays for students which shall inform them about water pollution and the means to minimise it.
How is the three-dimensional structure of type two collagen fibrils well-suited to their function during bone growth and development?
Answer:
Collagen is a hard, insoluble, and fibrous protein that makes up one-third of the protein in the human body. In most collagens, the molecules are packed together to form long, thin fibrils. These act as supporting structures and anchor cells to each other. They give the skin strength and elasticity.
Which list of elements is placed in order from most reactive to least reactive?
A. F, O, N, Ne
B. N, O, Ne, F
C. Ne, F, ON
D. N, Ne, O, F
A is the answer
The two reactive elements that you should remember are Flourine (F) and Francium (Fr), and only F is first for one answer.
You have joined a lab studying DNA replication in E. coli. The graduate student you are working with has identified a mutation in primase that makes primase very inefficient. Your project is to characterize the cells with this mutation. Predict the defects you would most likely see in the mutant E. coli cells. Choose one or more: A. a delay in the unwinding of DNA B. rapid lagging-strand synthesis but slow leading-strand synthesis C. a delay in DNA polymerase beginning synthesis D. a longer total time to replicate DNA E. inefficient Okazaki fragment joining
Answer:
C. a delay in DNA polymerase beginning synthesis
D. a longer total time to replicate DNA
Explanation:
DNA primases are RNA polymerases that play an active role during DNA replication by catalyzing the synthesis of short RNA sequences or 'primers' that are complementary to a single-stranded piece of DNA (i.e., to the DNA template). Primases are continuously required at the DNA replication fork before DNA replication can occur. Moreover, DNA polymerases always require a pre-existing primer sequence to initiate DNA chain elongation, thereby it is expected that an inefficient primase delay the DNA replication process and DNA polymerase activity.
Read the question and type out the
mRNA codon that would result. (make
sure to capitalize)
Answer: Threonine or Thr.
Explanation:
DNA or deoxyribonucleic acid is a molecule containing genetic information that is passed on from one generation to the next. This molecule is transcribed into another molecule called messenger ribonucleic acid or messenger RNA which is used for protein synthesis in the ribosomes. That is, the one that determines the order in which the amino acids of a protein will be joined. Both RNA and DNA have monomers called nucleotides, composed of a sugar molecule (ribose in RNA or deoxyribose in DNA) linked to a phosphate group and a nitrogenous base. The nitrogenous bases can be adenine (A), thymine (T), guanine (G), cytosine (C) and uracil (U) in RNA replacing T.
A codon is a sequence of three nucleotides found in RNA that codes an amino acid. The genetic code describes the relationship between the sequence of DNA bases in a gene and the corresponding sequence of the protein it encodes. Also note that there is base complementarity between DNA and RNA, that is why DNA is used to make RNA. Complementarity is the ability of the nitrogenous bases in the nucleic acid molecule to combine with their complement, Adenine (A) with Thymine (T) in DNA and A with U in RNA; and Cytosine (C) with Guanine (G) joined by hydrogen bridges.
In the figure, a RNA molecule is shown with the bases, showing which amino acid is code by each codon. In the case where there is a mutation and the G is replaced by an A in the codon coding for alanine, the codon would be ACA coding for threonine or Thr.
Describe how the location of the center of gravity of
passengers plays a role in their position in space
Explanation:
The effect of the position of the CG on the load imposed on an aircraft's wing in flight is significant to climb and cruising performance. ... This requires a higher AOA (Angle of Attack) of the wing, which results in more drag and, in turn, produces a higher stalling speed.
In glycolysis, glucose is converted into two molecules of _____.
a. citric acid
b. oxaloacetic acid
c. pyruvic acid
d. Acetyl CoA
pls help cheif
Answer:
c
Explanation:
Enzymes split a molecule of glucose into two molecules of pyruvate (also known as pyruvic acid). This occurs in several steps, as shown in Figure below. In glycolysis, glucose (C6) is split into two 3-carbon (C3) pyruvate molecules. This releases energy, which is transferred to ATP
Which example of a food production method is sustainable?
A. Planting a monoculture crop over large areas of land
B. Using no-till farming practices to decrease erosion
C. Using enough pesticides to reduce bee populations
D. Irrigating soil until it becomes waterlogged
what kind of hormone stores glucose if its in excesse
Answer:
A hormone that tells cells in your liver and muscles to convert glycogen into glucose and release it into your blood so your cells can use it for energy.
complementary strand of DNA?
DNA Strand 1: AATCGGTAC
Answer:
TTAGCCATG
Explanation:
Deoxyribonucleic acid (DNA) is a double helix molecule made up of two complementary polynucleotide strands oriented antiparallel to each other. Each nucleotide in both DNA strands is composed of a five-carbon sugar (deoxyribose), a phosphate group and a nitrogenous base. In DNA, there are four types of nitrogenous bases: Thymine, Guanine, Adenine and Cytosine (in RNA, Uracil replace Thymine). According to the base-pairing rules, Adenine always pairs with Thymine through two hydrogen bonds, whereas Guanine always pairs with Cytosine through three hydrogen bonds.
Which describes a way that carbon is pulled out of the atmosphere?
O A. When fossil fuels are used
O B. When oil is burned
C. When trees use photosynthesis
O D. When animals exhale
Answer:
C. When trees use photosynthesis
Explanation:
This is because trees and plants need carbon to survive.
What is the difference between a hepatic duct and a hepatic vein?
Explanation:
The liver is connected to two large blood vessels, the hepatic artery and the portal vein. The hepatic artery carries blood from the aorta to the liver, whereas the portal vein carries blood containing the digested nutrients from the entire gastrointestinal tract, and also from the spleen and pancreas to the liver.
What does deforestation mean?
Answer:
cutting down trees over a large area
Synthetic fiber has many characteristics that makes it more attractive than natural fiber for making clothing. Which of the following choices are true
1. Synthetic fiber has greater shape retention
2. Synthetic fiber often costs less
3. ALL options are correct
4. Synthetic fiber has greater durability
5. Synthetic fiber is more prone to heat damage in the wash than natural fibers
Answer:
C
Explanation:
Answer:
C
Explanation:
How can one use a community in teaching the concept "Safe use of agro-chemicals" to grade six level?
Answer:
A community can be divided into groups, where each group can present the correct ways to use agro-chemicals safely in different types of activity.
Explanation:
Using a community can be very helpful in teaching the safe use of agrochemicals. This is because, as a community usually has a large number of people, these people can be divided into small groups that will serve as small workshop rooms. Within these groups, the different ways to use agro-chemicals in a safe way, both for the applicator and for the environment, will be shown. Information on the composition of agrochemicals, first aid in case of accidents with the use of these products, among other things, can also be presented.
Human-created climate change is caused by
A. decreased burning of fossil fuels.
B. increased carbon dioxide in the air.
C. increased oxygen in the air.
D. increased use of green energy sources.
Answer:
B
hope that helps<3
Answer: B
Explanation: increased burning of fossil fuels coupled with deforestation have resulted in increased levels of CO2 in the atmosphere.
How is a scientific law different from a scientific theoryWhat is the difference between inorganic and organic compounds?
Answer:
A scientific law predicts the results of certain initial conditions. It might predict your unborn child’s possible hair colors, or how far a baseball travels when launched at a certain angle. In contrast, a theory tries to provide the most logical explanation about why things happen as they do. Organic molecules mainly have covalent bonds whereas, in inorganic molecules, there are covalent and ionic bonds. • Inorganic molecules cannot form long chained polymers as organic molecules do.Explanation: