Which model represents a DNA molecule?
Answer: The answer is D because the way they line up!!
Explanation:
The model that gives a true representation of a DNA molecule would be the 4th model.
What is the structure of DNA?According to Watson and Crick, the DNA is a double strand molecule with each strand twisting around one another to form a ladder-like, double helix structure.
Also, there is a complementarity of nucleotide bases such that Adenine (A) always pairs with Thymine (T) while Guanine (G) always pairs with Cytosine (C).
Thus, model 4 ticks all the characteristics of a typical DNA molecule.
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which cells have cell walls
a) animals
b) animal and plants
c) neither
Answer:
Plant cells have cell wall as well as a cell membrane. Animal cells simply have a cell membrane and no cell wall.
The answer is c I'm pretty sure. Hope this helps!
In what area of the world does the low pressure area stay in the winter? Why?
Answer:
Atlantic because minuses 0 degrees
Can we please please help
Answer:
I would say d
Explanation:
Answer:
i think the answer is d.
Invert syrup is a widely used sweetener, especially in candies and highly processed foods. Invert syrup can be made by treating sucrose with either an enzyme called sucrase or by heating sucrose with an acid. The end result is the same: each molecule of sucrose is hydrolyzed, resulting in _
Answer:
one glucose and one fructose molecule
Explanation:
Generally, inverted sugar is a mixture of two monosaccharides or simple/reducing sugars. More specifically, inverted sugar is a mixture of glucose and fructose.
Sucrose is a disaccharide containing one molecule of glucose and one molecule of fructose. Hence, when hydrolyzed, the glycosidic bond linking the glucose molecule with the fructose molecules becomes broken and the resulting product is a mixture of glucose and fructose molecules in equal proportions.
During spring in Colorado, ice on the mountain tops melts into water. Some of this water gets trapped in cracks in the mountain rocks. With winter, the water in the cracks refreezes into ice. When water freezes, it expands. This often will cause the cracks in the rocks to grow, and eventually, pieces of rock break off. What type of weathering is taking place?
A.
specific heat
B.
chemical
C.
biological
D.
physical
Answer:
Physical
this type of weathering is known as freezing and thawing
Give ttwo pieces of information that scientists use to prepare evolutionary trees for living and extinct organisms
Two pieces of information that scientists use to prepare evolutionary trees for living and extinct organisms are the fossil evidence that is found on the earth and the DNA samples, as these two are helpful in the evolutionary tree representation.
What is the significance of the evolutionary tree?An evolutionary tree, or phylogenetic tree, is a diagrammatic representation that shows the relationships between different species or groups and is used to represent the evolutionary history and how organisms are related to one another through common ancestry. The evolutionary tree is important as it helps scientists understand the relationships between different species and how they have evolved over time to form new species.
Hence, two pieces of information that scientists use to prepare evolutionary trees for living and extinct organisms are the fossil evidence that is found on the earth and the DNA samples, as these two are helpful in the evolutionary tree representation.
Learn more about the significance of the evolutionary tree here.
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help help plz I give you brainliest and plz explain.
Explain why animals are dependent on light energy
Answer:
Animals are dependent for multiple reasons.
Explanation:
The energy is transferred to animals when they eat plants. They also need it because vitamin D is given when animals get sunlight on their bodies, building strong bones and healthy marrow. The same happens when they eat vitamin D-rich plants. Hope this is helpful!
Which of the following structures provides support and movement ?
A. Heart and skin.
B. Nerves and brain
C. Lungs and spine.
D. Bones and muscles
discuss the contributions of pasteur, and koch to 'germ theory of disease' and to the prevention of diseases
Answer:
Pasteur showed that putrefaction is a process associated with organisms present in the air, while Koch identified the germs that cause different diseases
Explanation:
The germ theory states that pathogenic microorganisms called germs cause the disease state observed in a particular (infected) organism. The term 'germ' includes pathogenic bacteria, protists, fungi, and even non-living pathogens (e.g., viruses). This theory was developed and accepted due to the work of Louis Pasteur and Robert Koch. In the 1860s, Pasteur showed that germs were omnipresent in a flask open to the air, showing that putrefaction and fermentation are caused by these microorganisms. Moreover, in the 1880s, Koch identified the germs that cause different diseases, including tuberculosis (Mycobacterium tuberculosis) and cholera (Vibrio cholerae).
praw a diagram of the different type of
Soil horizon
Answer:
diagram
hope this pic helps you
Answer:
Hope it will help you be happy ^_^
If you cross a white-eyed female (ww) to a red-eyed male (WY) Drosophila fly, you will see red-eyed females and white-eyed males in the F1 generation. If you cross an F1 red-eyed female to an F1 white-eyed male, what is the approximate percentage of total progeny in the F2 generation that are white-eyed males
Answer:
25%
Explanation:
ww gives white-eye female
WY gives red-eye male
ww x WY
F1: Ww wY Ww wY
Ww - red-eye female
wY - white-eye male
Crossing the two F1
Ww x wY
F2: Ww WY ww wY
Remember that white-eye male = wY
Percentage of wY = 1/4 or 25%
Hence, the percentage of progeny in the F2 generation that would be white-eye males = 1/4 or 25%
Where does a 'thought' go when forgotten
Answer:
It dont go anywhere because it never existed
Explanation:
its gone its gone
What is the difference between self-love and selfishness according to Aristotle?
ANSWER ONLY FOR YOU KNOW
Answer:
The right kind of self-love is an achievement, love for what is best in us, motivated by self-love. Selfishness for Aristotle does not hold negative connotation, when considered in the context of a good or virtuous man., but rather motivates human action.
Explanation:
When did time begin?
Answer:
13.7 billion years ago
Explanation:
Answer:
That was billions of years ago.
Which of the following is NOT part of the cell theory?
a. There are many different types of cells with many different shapes and functions
b. The cell is the basic unit of life performing all necessary life functions
c. All living things are made of cells
d. All cells come from pre-existing cells
Answer:
Its a.
Explanation:
You got this
In a living organism, what is an organ?
ОА.
a structure that provides a specific service within a cell
Св.
a group of similar cells that perfom a common function
C.
functional unit, or building block, of all organisms smallest unit that can carry on the activities of life
a structure composed of a number of tissues that work together to perform a specific task
0.
Answer:a structure composed of a number of tissues that work together to perform a specific task
Explanation:
Original DNA →TACAGGGTCCACACT
Mutated DNA →TACAGGCGTCCACACT
What type of mutation took place in the above situation
Answer:
The original DNA sequence is:
DNA: TGC GTG CTT AAG CGG TGT ACA CGT TGC
mRNA: ACG CAC GAA UUC GCC ACA UGU GCA ACG
Amino acid: Thr His Glu Phe Ala Thr Cys Ala Thr
Explanation:
How is physical weathering different from chemical weathering?
A.
Physical weathering is always faster than chemical weathering.
B.
In chemical weathering, the composition of the weathered substance is changed.
C.
In physical weathering, the composition of the weather substance is changed.
D.
Chemical weathering is always faster than physical weathering.
Answer:B. In chemical weathering, the composition of the weathered substance is changed.
Explanation: Chemical weathering is the act of changing its form, such as color. Physical weathering remains in its shape, but can change due to breaking into smaller sediments.
Which of the following describes how the pollen must travel in order for pollination to occur?
Question 18 options:
. from the stigma to the anther
from an anther to the style
from an anther to the stigma
from the stigma to the pollen tube
Answer:
the answer is C
Explanation:
another word for stamen is anther and i took the K12 test
hope you do great
HELP NOW PLS
Air masses are moved around by _____________.
Answer:
Air mass motion is usually from the air flow in the upper atmosphere. As a stream changes intensity, and position, it affects motion, and strength of air masses.
Explanation:
stars.
• What type of star has a high temperature but a low luminosity?
Help
Answer: White Dwarf 18
Explanation:
Answer:
white dwarf
Explanation:
they have a high temp but a low luminosity
for every girl
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Next Question
what
Explanation:
what you talking about
The images represent sexual and asexual reproduction. These methods of reproduction vary in terms of the genetic composition of offspring. In __________ the offspring are genetically identical to the parents.
Answer:
in asexual reproduction the offsprings are genetically identical to the parents.
Explanation:
Answer:
Images B and C
Explanation:
.
Health researchers measure how often people exercise and how often the same people come down with the flu. The researchers find a negative correlation between the amount of weekly exercise and the number of flu symptoms in an individual. Based on this information, which of the following can we assume are TRUE?
a. People who exercise more tend to have the flu less often.
b. People who have the flu more often tend to exercise less.
c. Exercising causes people to be more healthy and less susceptible to the flu.
d. People who get sick do not have time to exercise.
e. Since exercise reduces the flu, this is really positive correlation because the result is good.
f. Since the flu is a bad thing, this makes it a negative correlation.
Answer:
a, b, and c
Explanation:
Generally, correlation measures the strength of the relationship that exists between two variables. A positive correlation means that the two variables have the tendency to either increase or decrease together while a negative correlation means that the two variables tend to move in opposing directions, that is, as one is increasing, the other is decreasing and vice versa.
Now, the researchers find a negative correlation between the amount of weekly exercise and the number of flu symptoms in the subjects. This means that the more the exercise, the lesser the number of flu symptoms and the lesser the exercise per week, the more the flu symptoms. Hence, the assumptions that can be made directly or indirectly from the findings include
People who exercise more, get sick or have flu less often.People who have the flu more are most likely exercising very little or not at all.Exercising causes people to be more healthy and less susceptible to the flu.The correct options are a, b, and c.
Structure: Which of the following best describes the arrangement of the sides of the
DNA molecule
Bonding
Anitparallel
Alternating
Parallel
Music of
US 2:48
Answer:
Alternating
Explanation:
the arrangement of the sides of the
DNA molecule bonding is Alternating
The best description of arrangement of the sides of the DNA molecule bonding is; Alternating.
The DNA molecule is made up of of two strands that are wound around one another to form a shape known as a double helix.
The double-helix can be compared to a twisted ladder and is therefore categorised as alternating.
Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.
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Ion pumps and phagocytosis are both examples of
________.
a. endocytosis
b. passive transport
c. active transport
d. facilitated diffusion
Answer:
A
Explanation:
EDGE2021
Ion pumps and phagocytosis are both examples of active transport. Therefore, the correct option is C.
The movement of molecules or ions across the cell membrane against a gradient of concentration, from an area of lower concentration to an area of higher concentration, is called active transport. In this whole process energy must be used in the form of ATP (adenosine triphosphate).
Ion pumps are membrane proteins that actively transport ions across the concentration gradient across the cell membrane. These ions include sodium, potassium, calcium or hydrogen ions. The ion concentration imbalance required for many cellular functions is maintained by these pumps.
On the other hand, phagocytosis is a type of endocytosis in which cells engulf large molecules or solid particles and internalize them. Energy is required for the formation of pseudopods and for the solubilization of substances in the phagosome inside the cell.
Therefore, the correct option is C.
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Oil is a nonrenewable resource because it:
is made from plant remains
will never run out
takes millions of years to make
is quickly and easily made
Answer:
C. Takes millions of years to make
PLEASE HELP ASAP! WILL GIVE BRAINLIEST TO CORRECT ANSWER! HELP!! HELP!!
The diagram shows the structure of an animal cell.
The image of an animal cell is shown with some organelles labeled numerically from 1 to 6. The outer double layer boundary of the cell is labeled 1. A stacked disc like structure is labeled 2. A broad rod shaped structure with an irregular shape inside it is labeled 3. The entire plain section that forms the background of the cell and is within the outer boundary is labeled 4. A small circular shape within the large circular shape is labeled 5. The large central circular shape is labeled 6.
Which number label represents the cell membrane?
1
2
4
6
(this is middle school science)
Answer:
4
Explanation:
Answer:
4
Explanation:
I took the test
Is this correct please tell me if it is and if it ain't tell me correct answer
Answer:
I think u right. it's what I woulda picked
