You've been tasked to study the movements of condensed chromosomes during cell division.
You have access to a magnifying glass, a standard light microscope, a scanning electron
microscope and a transmission electron microscope. Which piece of equipment would you choose
and why? Also why would you NOT choose the others? (max 50 words)
Answers
In order to see something as small as a chromosome, It is necessary to employ the use of a scanning electron microscope.
The question states that we wish to study the movements of condensed chromosomes during cellular division. This means that we will need a scope capable of not only looking inside of a cell but even inside of the nucleus of a cell, an extremely minute space.
Logically, a magnifying glass will not be able to accomplish this given that it only allows us to see macroscopic elements, many hundreds of times bigger than what we wish to observe. We run into similar limitations with standard light and transmission microscopes. Although these allow us to see things on a microscopic level, they fall short of the desired capability.
Though the transmission microscope can see even smaller elements than a standard light microscope, both are limited to the surface of cells. The SEM or scanning electron microscope, on the other hand, allows the user to see elements down to 0.1 nanometers in size. Given that chromosomes are between 10 and 30 nanometers in size, we can use this microscope for the desired study.
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Related Questions
DNA synthesis involves unwinding two strands of parent DNA, copying each strand to synthesize complementary strands, and release of parent and daughter DNA. Which of the following accurately describes this process. Is this Anabolic or catabolic reaction
Answers
Answer:
This is an anabolic process.
Explanation:
DNA replication involves unwinding two strands of parent DNA, copying each strand to synthesize complementary strands, and releasing the parent and daughter DNA. Thus, it is an anabolic process.
The himalayan mountains were formed baecause of a
a.convergent boundary
B.transform fault
c.hot spot
D.divergent boundary
Answers
Explanation:
because of convergent fault (B).
hope this helps you.
Answer the following questions.
n 1) Plants Impact many things that we take for granted. Our lives are in many ways
Intertwined with theirs. Think about it. Which of the following listed daily events
demonstrates the importance of plants in our daily life? Select all that apply.
having a sandwich for lunch
sitting at wooden desks
I picking wildflowers
eating a favorite breakfast cereal
throwing a granite rock
asking permission to go to recess.
reading paper books and magazines
sleeping in beds under cotton sheets
Answers
Answer: reading paper books and magazines, sleeping in beds under cotton sheets, having a sandwich for lunch , sitting at wooden desks , I picking wildflowers , eating a favorite breakfast cereal.
Explanation: These are all correct because each has to deal with plants. For example, reading the paper books, sleeping in the bed and sitting at the wooden desk all have to due with the products that come from plants. Paper, cotton, and wood are all grown from plants and turned into resources. Next picking flowers, eating foods are also direct examples of how plants help us. Picking flowers that come directly from plants. Then eating food that is grown from plants shows that it is directly plants providing for humans.
What is the purpose of strand B?
a.) To act as a template for the synthesis of messenger RNA
b.) To carry the code from the DNA molecule in the nucleus to the ribosome
c.) Delivers specific amino acids to the ribosome to make proteins
d.) Transfers nucleic acids to the nucleus
Answers
Answer:
The answer is a)
Explanation:
Hope it is helpful for you ✌️
what is cellular respiration
Answers
Answer: Cellular respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert chemical energy from oxygen molecules or nutrients into adenosine triphosphate, and then release waste products.
Explanation:
What is the concept of genetic engineering? Cite its advantages and disadvantage (if there is any).
Answers
Answer:
Genetic engineering is the process of using recombinant DNA (rDNA) technology to alter the genetic makeup of an organism.
Disadvantages
The nutritional value of foods can be less. .
Pathogens adapt to the new genetic profiles
There can be negative side effects that are unexpected
The amount of diversity developed can be less favorable
Copyrighted genetic engineering can have costly consequences.
Advantages
More nutritious food.
Tastier food.
Disease- and drought-resistant plants that require fewer environmental resources (such as water and fertilizer)
Less use of pesticides.
Increased supply of food with reduced cost and longer shelf life.
Faster growing plants and animals.
u want point answer this question how many different thing can be diffrent colors
Answers
Answer:
Millions of things, all of humanity can see millions, but as for the color, there is more than a million, infinity basically, you can make new colors, but can't see them.
Explanation:
Study says "A healthy human eye has three types of cone cells, each of which can register about 100 different color shades, therefore most researchers ballpark the number of colors we can distinguish at around a million."
khái niệm, tác dụng ,cơ chế tác dụng của vi khuẩn sinh acid lactic
Answers
The concept, effect, mechanism of action of lactic acid bacteria
What is the biology
Answers
Answer:
science that studies living things
Explanation:
it includes plants and animals so basically anything that has life
Answer:
Biology is the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behaviour, origin, and distribution.
Explanation: Branches of biology are different topics related to biology; for example the 3 major branches of biology are:
Botany, also called plant science, plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field
Zoology is the branch of biology that studies the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems.
Microbiology is the study of microorganisms, those being unicellular, multicellular, or acellular. Microbiology encompasses numerous sub-disciplines including virology, parasitology, mycology and bacteriology.
phenol, strong acids and bases are examples of hazardous chemicals that are
Answers
Answer:
corrosive chemicals thank you
Marine biologists have determined that when a shark detects the presence of blood in the water, it will swim in the direction in which the concentration of the blood increases most rapidly. Based on tests conducted by the biologists, the concentration of blood (in parts per million) at a point P(x,y,z) on the surface of sea water is approximated by
Answers
Blood concentration is approximated by the distance from the source.
The concentration of blood at a point P(x,y,z) on the surface of sea water is approximated by the distance from the source where the blood moves. Point x is the place where the concentration of the blood is the highest because at this point the source of blood present.
At point y, the concentration of the blood is lower as compared to point x but higher than point z, while on the other hand, at point z the concentration of blood is the lowest due to its presence farther from the source so we can conclude that blood concentration is approximated by the distance from the source.
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3-carbon-atom (3C) molecule produced in glycolysis is called______________________. Inside a eukaryotic cell, this molecule moves from ______________to ________________ and is oxidized into _____________. If oxygen is not present, it gets reduced into _____________ (in yeast) or ______________(in our muscle cells). Production of ATP in the absence of O2 is called____________________.
Answers
Answer:
PYRUVATECYTOPLASMMITROCHONDRIAACETYL COAETHANOL AND CO2LACTIC ACIDANAEROBIC RESPIRATION(FERMENTATION)How are the cells in the circulatory system helping me in the action of kicking a ball?Do some have specific jobs?
Answers
Answer:
Exercise causes the heart to pump blood into the circulation more efficiently as a result of more forceful and efficient myocardial contractions, increased perfusion of tissues and organs with blood, and increased oxygen delivery. Aerobic exercise trains the heart to become more efficient.
Explanation:
Which of the following is NOT a function of the nervous system?
a. receives information about your body
c. signals a response to stimuli
b. maintains homeostasis
d all of these are nervous system functions
Answers
Answer:
d
Explanation:
all of these are nervous system function
Answer:
D
Explanation:
All of these are nervous system functions, your nervous system controls your whole body. Since your nervous system is comprised of your brain and other things like the brain stem, everything in your body you can imagine is from the nervous system.
Consider the following bones: femur, humerus, sternum, scapula, and rib. Which of these bones are flat?
Answers
Answer:
The ribs
Explanation:
The long ones are big and the flat bones like the ribs are mostly curved
a research about carnivorous plants consists of what information?
Answers
Answer: about how they grow and diet and how they do it by it I mean what they do for the process of eating it
Explanation:
What was the universe immediately before the Big Bang occurred?
a black hole
a singularity
a super spiral galaxy
a mass of antimatter
Answers
the answer is a black hole
The universe immediately before the Big Bang occurred as a black hole. Thus, the correct option is A.
What is the Big bang?The big bang may be defined as the cosmic explosion that significantly marked the initiation of the universe according to the big bang theory. The origin of the universe is explained by the Big Bang theory.
At initial, the whole universe appeared like a black hole where no life is present. It was all the dark around each and every corner. The universe was an infinite stretch of ultrahot, dense material and everything consisted of empty space.
Before the big bang, the universe was almost infinitely small, dark, and a size less than a trillionth of a second. It was a period of inflation which is followed by a more catastrophic event which was violent, and known as the period of expansion.
Therefore, the universe immediately before the Big Bang occurred as a black hole. Thus, the correct option is A.
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explain why we have to reduce the number of trees being cut down
Answers
Answer: Reasons for cutting down trees
Explanation:
Cutting trees is an essential tool for creating habitat conditions for many wildlife species, especially game species. Eighth, cutting trees is key to forest restoration efforts.
During a third-trimester ultrasound, what would a doctor expect to observe in a fetus?
Answers
please match these for me the last 2 are
-are uses a focused beam of electrons to see details inside small objects
-uses a probe to scan the surface of an object and create an image
Answers
Scientists set up ___
and then record
to be tested during an experiment,
And then record ___ as they conduct the experiment
Answers
Answer:
1. a hypothesis
2. the results
Explanation:
What is the genotype?
A A trait that will not be seen in the next generation of offspring.
B A trait that is hidden by another trait.
C The makeup of genetic material.
D What the trait looks like.
Answers
Answer:
C. La composición del material genético.
Explanation:
Answer:
The makeup of genetic material.
1 point
What is the difference between a solid, a liquid and a gas of the same substance?
O None of the above are true.
Answers
Answer:solid: Has a definite shape and volume. liquid: Has a definite volume, but take the shape of the container. gas: Has no definite shape or volume.
Explanation:
Which of the following are true regarding ores?
I. Ores can be metallic.
II. Ores can be nonmetallic.
III. Ores consist of minerals.
IV. Materials removed from ores are useful.
A. I, II, III, and IV
ОВ.
II, III, and IV only
C. I, III, and IV only
D. I, II, and Ill only
Answers
Answer: its B: I, II, III, and IV
Explanation: i took the K12 test
Minerals are prone to destruction by elements such as oxygen, heat, and acid.
True or False
Answers
Answer:
True
Explanation:
Minerals are prone to destruction by different elements such as oxygen, heat, and acids treatment. The given statement is true. On treatment with these elements, minerals loose their properties.
What are minerals?
Minerals are the naturally occurring inorganic elements or compounds which posses an orderly internal structure and characteristics with the specific chemical composition, crystal form, and properties such as physical properties and chemical properties. Minerals differ from the rocks, which are the naturally occurring solids that are composed of one or more types of minerals.
Minerals show properties which can be lost by the treatment with different elements. Minerals have been found to be prone to destruction by the elements such as oxygen, heat, and acids. Minerals undergo chemical and physical change on treatment with these elements and form different products which show different characteristics than the parent minerals.
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One person pulls on a rope with a force of 400 N to the right. Another
person pulls on the opposite end with a force of 600 N to the left. What is
the net force?
Answers
Two forces are applied on the rope of the magnitude 400N to the right and 600N to the left, as a result of these forces the net force on the object will be 200N. Thus, the correct option is A.
What is Net force?Net force is the resultant force of the total force which is being applied on an object. It is the sum total of the effect of all the forces on an object. Forces which are applied in opposite directions cancel out each other.
If the net force applied on an object is not zero, then it can be said that the object is not in equilibrium, and thus Newton's Second Law can be used to determine the motion of the object.
Here, two forces of different magnitudes and in opposite directions are applied on the rope to pull the rope. The forces are 400N to the right and 600N to the left.
As a result of these forces, the net force applied on the rope can be calculated by:
Net force = Difference between the forces applied in opposite directions or the sum of the forces which are applied in same direction
Net force = 600N (force applied to the left) - 400N (force applied to the right)
Net force = 200 N and the direction will be left as the magnitude is more in left direction than right
Therefore, the correct option is A.
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While distinctly Anthropoids, some Platyrrhines maintain a few of traits that are typically represented only in Prosimians. For this question, identify the seemingly primitive traits and discuss how their presence in both Platyrrhines and Prosimians may reflect an example of convergent (parallel) evolution. (150-250 wds)
Answers
Convergent evolution is the concept of two or more species evolving similar traits despite being completely unrelated to one another, including the absence of a common ancestor.
The Platyrrhines, more commonly known as "New World Monkeys", share many characteristics with the Prosimians. Some of these include:
Teeth layoutDietEyesight Sleeping habitsand more.
The Platyrrhines and the Prosimians are both nocturnal animals. Despite all other members of their family being active during the day, the Playrrhines have evolved nocturnal habits similar to that of the Prosimians. Aside from that, they feed on insects more so than fruit, which is reflected by the layout of their teeth, and have eyesight well adapted to dark conditions. All of these are traits they share with the Prosimians.
Despite being in different ecosystems and regions, and sharing no recent common ancestors, both of these species have evolved strikingly similar traits. This can be used to corroborate the theory of convergent evolution, which explains how two species can evolve very similar traits despite being unrelated.
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5. What is the optimal pH for both enzymes in the picture? Where do you think they are found in the body? Enzyme Activity *Trypsin + Pepsin 9 11 3 十7 5 pH Figure 1. Activity levels of two digestive enzymes over a range of pH
Answers
hich elements are most like to form a binary ionic compound?
Select one:
a.
sodium and aluminum
b.
calcium and potassium
c.
phosphorus and oxygen
d.
lithium and nitrogen
e.
hydrosulfuric acid
Answers
A pair of elements will most likely form an ionic bond if one is a metal and one is a nonmetal. These types of ionic compounds are composed of monatomic cations and anions.
can anyone heelp me
pls pls
Answers
Answer: lotion- semi-solid
capsule- solid
suspension- liquid
Explanation: