A certain mutation in the human chromosome number 9 causes part of the chromosome to break and reattach itself in a reverse manner. What kind of mutation is this? a.chromosomal duplication b.chromosomal inversion c.chromosomal deletion

QUESTION POSTED AT 18/01/2020 - 06:11 AM

Answered by admin AT 18/01/2020 - 06:11 AM

The answer is b. chromosomal inversion

Chromosomal inversion is a point mutation which means the mutation only involves a single chromosome. This happens when two breaks occur within the strand freeing the single chromosome to move. The single chromosome that breaks off rotates 180 degrees before reattaching. The chromosome "inverts" itself, that's why the mutation is called inversion.
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Related questions

What's it called when matter is broken down into smaller and smaller pieces and you can't break it down anymore? A mineral A cell A virus An atom

I believe your answer would be an atom. 
Classical Greek philosophers, notably a man named Democritus, who lived in Greece in the 5th century was interested about the world around us. He thought up a very simple situation: If you cut something in half (like a log), the two pieces left can cut into even smaller pieces, which can cut again, and so on down to splinters. Yet, even a splinter could be cut in half. He questioned, "Whats the smallest that something can be cut?" He answer was that, at some very, very small size, you would reach a piece of the object that was 'atomos', Greek for uncuttable. 
If you had a block of iron and let's say you kept cutting it into pieces, you would, in theory, reach an extremely small piece which could absolutely not be broken down-- it was the basic building block of iron. This was, and is, a powerful idea that gives reason for all sorts of things related to chemistry and the world we live in-- like how our bodies digest food (since everything is made up of just a limited number of types of atoms (the elements), we can ingest food in one form, break the food down into small groups of atoms, and put the atoms back together as parts of our growing bodies). Modern chemistry is formed on atomic theory. Atoms are almost unbelievably small, one of your hairs is about a million atoms wide, and a speck of dust you can see might as well contain trillions of atoms. 
I got my answer and reasoning from a website called "scienceline.ucsb.edu". It goes way more into depth for your answer, you might want to check it out. I just chose bits of info that directly give reasoning as to why your answer would be An atom
Good luck on your assignment. 

ANSWERED AT 21/02/2020 - 11:24 AM


QUESTION POSTED AT 21/02/2020 - 11:24 AM

What is a main difference in cell structure between an onion cell and a human cheek cell?

An onion cell has a cell wall while a cheek cell does not

ANSWERED AT 21/02/2020 - 11:00 AM


QUESTION POSTED AT 21/02/2020 - 11:00 AM

Which of these is the human body's first line of defense against invading pathogens such as bacteria and viruses? a.body temperature b.macrophages c.skin cells d.vitamins

I believe the correct answer from the choices listed above is option C. The human body's first line of defense against invading pathogens such as bacteria and viruses would be the skin cells. It is what covers the whole body. Hope this answers the question.

ANSWERED AT 20/02/2020 - 11:22 PM


QUESTION POSTED AT 20/02/2020 - 11:22 PM

What are two parts used to carry the microscople?

The base and the arm and/or neck

ANSWERED AT 20/02/2020 - 11:06 PM


QUESTION POSTED AT 20/02/2020 - 11:06 PM

Mutations can occur in the chromosomes of all types of cells. mutations that are passed on to offspring must occur in ?

Some mutations don't have any noticeable effect on the phenotype of an organism. This can happen in many situations: perhaps the mutation occurs in a stretch of DNA with no function, or perhaps the mutation occurs in a protein-coding region, but ends up not affecting the amino acid sequence of the protein.

ANSWERED AT 20/02/2020 - 11:03 PM


QUESTION POSTED AT 20/02/2020 - 11:03 PM

Lable all the parts of a of a plant cell and what it does

Nucleus- Contains genetic material which controls the activities of the cell.
Cytoplasm- Most chemical processes take place here, controlled by enzymes.
Cell membrane- Controls the movement of substances into and out of the cell.
Mitochondria- Most energy is released by respiration here.
Ribosomes- Protein synthesis happens here.
Cell wall- Strengthens the cell.
Chloroplasts- Contain chlorophyll, which absorbs light energy for photosynthesis.
Permanent vacuole- Filled with cell sap to help keep the cell enlarged and swollen with water.

ANSWERED AT 20/02/2020 - 10:54 PM


QUESTION POSTED AT 20/02/2020 - 10:54 PM

How does microgravity affect the human body? A: QUICK ANSWER

Microgravity usually makes your body very nauseous, and due to it, your bones, especially your spine, enlarges by some percent. (Not all effects)

ANSWERED AT 20/02/2020 - 10:48 PM


QUESTION POSTED AT 20/02/2020 - 10:48 PM

What happens when a sound wave moves from water to air? It slows down. It speeds up. It stays the same. It reverses. When two mechanical waves have a displacement in opposite directions, and they overlap, what will the resulting wave look like and why? The new wave will have the same displacement as the original waves due to constructive interference. The new wave will have a smaller displacement than either of the original waves due to destructive interference. The new wave will have a greater displacement than either of the original waves due to constructive interference. The new wave will have the same displacement as the original waves due to destructive interference.

Question 1

The correct answer for above statement is:

It speeds up.

Explanation;

In the air, the sound emanating from water will slow down. The sound goes by the vibration of the molecules and particles existing in the medium. The water is compact medium and the molecules present in water are closely bound as contrasted to the air.Sound waves travel FASTER within water than through air.

Question 2.

The correct answer is;

The new wave will have the same displacement as the original waves due to constructive interference.

Explanation:

The wave interference is supposed to be a constructive wave interference if the top of a wave meets the crest of another wave of the equal frequency at the identical point.Constructive wave interference is a wave interference which happens when in phase waves appears with each other and forms a new wave with larger amplitude.

ANSWERED AT 20/02/2020 - 10:47 PM


QUESTION POSTED AT 20/02/2020 - 10:47 PM

(LOTS OF POINTS ) Identify the characteristics of fungus-like protists. Check all that apply. decomposers autotrophs produce spores stationary (stupid answers will be deleted)

The correct options given below:

- decomposes

- spores

The fungus-like protists such as slime molds, have some common features like fungi. Some of the common features are mentioned below:

  • Nutritionally they are heterotrophs like fungi. They get energy from dead and decaying matter such as rotting logs or leaves. Thus, they are decomposers.
  • Like fungi they reproduce by forming spores in the sporangia.

ANSWERED AT 20/02/2020 - 10:38 PM


QUESTION POSTED AT 20/02/2020 - 10:38 PM

Walter Sutton investigated the number of -------- in grasshoppers.

There were 16 grasshoppers

ANSWERED AT 20/02/2020 - 10:37 PM


QUESTION POSTED AT 20/02/2020 - 10:37 PM

Fill in the blank. In the -------- division of meiosis, chromatids split apart, becoming single chromosomes

The division of meiosis chromatids split apart, and become single chromosomes is anaphase

ANSWERED AT 20/02/2020 - 10:21 PM


QUESTION POSTED AT 20/02/2020 - 10:21 PM

List one advantage,disadvantage about sporulation and what kind of organisms do this?

I said just so you know that sporulation can make any more fowers but a disadvanteage i could be wiped out eaisily 

ANSWERED AT 20/02/2020 - 10:20 PM


QUESTION POSTED AT 20/02/2020 - 10:20 PM

A growing human population means more food is needed. Improvements in farming can help meet this demand. Which of the following have helped provide more food? fertilizers, pesticides, and more efficient farming practices more people following a vegetarian diet an increase in the number of farmers willing to work long hours an increase in the number of people moving away from the city to live on farms

The answer is definitely the first one, the reasons are: A.) Fertilizer helps plants grow faster and they help the plant produce more.

                                                                                      B. ) Pesticides kill harmful insects that would otherwise ravage the food supply. 

                                                                                      C.) The easier it is to farm, more food you can make in a short amount of time. Allowing for higher food production.

ANSWERED AT 20/02/2020 - 09:31 PM


QUESTION POSTED AT 20/02/2020 - 09:31 PM

Which kind of electrical charge is found on a hydrogen atom of a polar water molecule?

It has a positive charge,

ANSWERED AT 20/02/2020 - 01:30 PM


QUESTION POSTED AT 20/02/2020 - 01:30 PM

Numbers are expressed in scientific notation using exponents

By using exponents, we can reformat numbers. This can be helpful, in much the same way that it's helpful (that is, it's easier) to write "twelve trillion" rather than 12,000,000,000,000., or "thirty nanometers" rather than "0.00000003 meters" very large or very small numbers, it is sometimes simpler to use "scientific notation" (so called, because scientists often deal with very large and very small numbers).The format for writing a number in scientific notation is fairly simple: (first digit of the number) followed by (the decimal point) and then (all the rest of the digits of the number), times (10 to an appropriate power).

ANSWERED AT 20/02/2020 - 01:25 PM


QUESTION POSTED AT 20/02/2020 - 01:25 PM

Humans ferment _______ in muscles where oxygen becomes depleted. a. alcohol b. lactic acid c. carbon dioxide d. glucose

I think that it is b. lactic acid

ANSWERED AT 20/02/2020 - 12:28 PM


QUESTION POSTED AT 20/02/2020 - 12:28 PM

If the body cells of an organism had 48 chromosomes what are the haploid and diploid numbers of chromosomes

Haploid= 48 Diploid=24 
Usually in humans it is 46 and 23

ANSWERED AT 20/02/2020 - 12:15 PM


QUESTION POSTED AT 20/02/2020 - 12:15 PM

Why do mutations make such a large contribution to bacterial genetic variation?

They are rare, but can significantly increase genetic diversity when reproductive rates are high

ANSWERED AT 20/02/2020 - 11:43 AM


QUESTION POSTED AT 20/02/2020 - 11:43 AM

How do natural disasters weaken a community’s social infrastructure? a. Social systems are unbalanced by the damage caused by natural disasters. b. Natural disasters tend to target the poorest members of a community. c. The number of natural disasters is increasing across the globe. d. Natural disasters can cause billions of dollars in property damage. Someone said A and someone said D. Does anyone know?? thanks :)

Answer;

Natural disasters can cause billions of dollars in property damage.

Explanation;

-Natural disasters are disasters that are caused by nature, not by human. they include; Earthquakes, tornadoes, hurricanes, tsunamis, volcano eruptions, floods, wildfires, etc. Natural disasters can cause billions of dollars in property damage. Systems are unbalanced by the damage caused by natural disasters. The social infrastructure of a community includes social assets such as schools, hospitals, prisons and community housing. Such places are damaged in natural disaster, adversely affecting the community.

ANSWERED AT 20/02/2020 - 10:41 AM


QUESTION POSTED AT 20/02/2020 - 10:41 AM

Twenty-three is the haploid number of chromosomes in man True or False?

True twenty three hhhhhhhhhiiiiiiiiiiii your welcome

ANSWERED AT 19/02/2020 - 01:16 PM


QUESTION POSTED AT 19/02/2020 - 01:16 PM

Explain why the chromosomes in haploid cells that are produced by meisis

chromosomes in meiosis one go from tetrads (groups of four chromosomes, 2 homologous pairs) to 2 cells of sister chromatids. and in meiosis two, the sister chromatids because four cells with chromosomes in them

ANSWERED AT 19/02/2020 - 12:14 AM


QUESTION POSTED AT 19/02/2020 - 12:14 AM

What part of the cell theory explains why organisme grow?

The third part of the cell theory surely explains how organisms grow, but unfortunately not why. It says that every living cell originates as a result of the division of a preexisting cell and no cell can spontaneously self-assemble as it was believed till the middle of the 19th century according to the anomalous generation theory.

ANSWERED AT 18/02/2020 - 11:36 PM


QUESTION POSTED AT 18/02/2020 - 11:36 PM

A student designs an experiment to see if detergent affects the growth of seeds. He sets up 10 seed pots. Five of the seed pots will receive a small amount of detergent in the soil and will be placed in the shade. The other five seed pots will not receive detergent and will be placed in the sun. All 10 seed pots will receive the same amount of water, the same number of seeds, and the same type of seeds. He allows the seeds to grow for two months and charts their growth every two days. What is wrong with his experiment? A) More than one variable is being tested. B) The student should have a larger number of pots. C) There is no way of measuring the outcome. D) There is no control set up.

Hello there!

A student designs an experiment to see if detergent affects the growth of seeds. He sets up 10 seed pots. Five of the seed pots will receive a small amount of detergent in the soil and will be placed in the shade. The other five seed pots will not receive detergent and will be placed in the sun. All 10 seed pots will receive the same amount of water, the same number of seeds, and the same type of seeds. He allows the seeds to grow for two months and charts their growth every two days. What is wrong with his experiment?

A) More than one variable is being tested.

ANSWERED AT 18/02/2020 - 02:54 PM


QUESTION POSTED AT 18/02/2020 - 02:54 PM

1. Which of the following sets of terms could be used in a description of the peripheral nervous system? A. motor neuron, interneuron, sensory neuron B. brain, sensory neuron, myelin C. interneuron, spinal cord, autonomic D. somatic, brain, spinal cord 2. Which of the following is not a function of the human nervous system? A. regulating heartbeat B. listening to music C. moving oxygen from air into the blood D. signaling the diaphragm to contract 3. Which of the following correctly describes how nerve impulses move throughout the body? A. electrical trans

Q1. The answer is A. motor neuron, interneuron, sensory neuron

Sensory neuron receives signals from the environment and sends it to the central nervous system. Interneuron is the part of the central nervous system, it is found in the spinal cord where is involved in reflex action. In those reflex actions, the signal from sensory neuron is sent to interneuron and it sends it back to motor neuron which sends the signal to the effectors. In reflex actions signal is not sent to the brain because immediate reaction is necessary.


Q2. The answer is  
C. moving oxygen from air into the blood

The central nervous system is involved in 
regulating heartbeat, listening to music, signaling the diaphragm to contract. However, it is not involved in moving oxygen from air into the blood. Circulatory and respiratory systems are responsible for moving oxygen from air into the blood.

ANSWERED AT 18/02/2020 - 02:29 PM


QUESTION POSTED AT 18/02/2020 - 02:29 PM

Which of the following statements about succession is not true? a. Succession is the cause of ecosystem destruction. b. Succession is a process that allows communities to recover from disruptive events. c. The process of succession is necessary to maintain and establish stable communities. d. Succession can follow both human and natural events.

Answer: a.  Succession is the cause of ecosystem destruction.

Explanation:

An ecological succession can be define as a change that occur in the biotic community of the ecosystem with respect to the changes that occur in the surrounding environmental factors with respect to time until the ecosystem attains stability.

Succession is the cause of the ecosystem destruction is not true about the succession this is because of the fact that an ecological succession is a natural process that aids in the development of the ecosystem instead of it's destroying it. It initiate to provide the stability to the living species and their surrounding environment.

ANSWERED AT 18/02/2020 - 02:28 PM


QUESTION POSTED AT 18/02/2020 - 02:28 PM