If an individual has trisomy resulting in Down syndrome and has an extra chromosome in each cell, what mutation must have occurred?
A. A nondisjunction mutation in the gamete of one of the parents
B. A nondisjunction in both gametes of the parents
C. A nondisjunction in one of the first gamete cells of the individual
D. A nondisjunction mutation in body cells of both parents
Answer:
if An individual has an extra chromosome in every one of its cells, the mutation that must have occurred is A non-disjunction mutation in the gamete of one of the parents
If an individual has trisomy resulting in Down syndrome and has an extra chromosome in each cell, the mutation that must have occurred is A. A nondisjunction mutation in the gamete of one of the parents.
Down syndrome simply means a genetic disorder that is caused when there's an abnormal cell division that then leads to extra genetic material.
The effect of Down syndrome is the fact that it leads to an intellectual disability, developmental delays, and a distinct facial appearance.
The mutation that has occurred with someone that has a Down syndrome is the nondisjunction mutation in the gamete of one of the parents.
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The introduction of some nonnative species has been helpful. How can initially useful organisms become harmful to an ecosystem?
Answer:
See explanation
Explanation:
The introduction of nonnative species in an ecosystem maybe both helpful and harmful. Initially, the introduced nonnative species maybe prove helpful in some ways.
As time goes on, the nonnative species begin to compete with the native species for resources in the ecosystem. The nonnative species may outdo the native species in such competition and entirely replace them. This may ultimately lead to a permanent loss of the native species from the ecosystem.
xà phòng hóa hoàn toàn 66,6 gam hỗn hợp 2 este HCOOC2H5 và CH3COOCH3 bằng dung dịch NaOH thu được hỗn hợp X gồm 2 ancol. Đun nóng hỗn hợp X với H2SO4 đặc ở 140 độ C sau phản ứng xảy ra hoàn toàn thu được m gam nước. Giá trị của m
Answer:
IS THIS EVEN ENGLISH YES
Explanation:
The exchange of genetic materials between homologous chromosomes is called
a. synapsis
b. chiasmata
c. crossing over
d. cytokinesis
Answer:
c is correct answer ......
Which of the following statements about biomolecules is true?
I. Biomolecules are the basis of life.
II. Biomolecules are involved in the metabolic processes of all living organisms.
III. Biomolecules are inorganic molecules.
Which can disrupt the cell cycle?
A. mutation
B. GO phase
C. replication
D. cancer
Answer:
Mutation can disrupt the cell cycle.
A person who studies about rocks is Called
Answer:
Petrologist
Explanation:
Petrology, scientific study of rocks that deals with their composition, texture, and structure; their occurrence and distribution; and their origin in relation to physicochemical conditions and geologic processes.
hope it helped
Answer: Is called a petrologist
Explanation: Petrology is the scientific name for the study of rocks and the conditions in which they form so the person who study's petrology is under the term petrologist
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If a cell has 10 chromosomes when it begins mitosis, how many will it have immediately afterword?
Answer:
Explanation:
Therefore, there will be two daughter cells at the end of mitosis. Each will have 10 chromosomes, if the parent cell has 10. The chromsomes will not have sister chromatids because after mitosis, the duplicated pairs have separated into the two daughter cells. The cells will each be diploid, just as the parent cell was.
Explanation:
If a cell has 10 chromosomes when it begins mitosis, there are 15 will have immediately afterword.
eople that have a single allele (gene copy) for sickle cell anemia are typically not sick from the disease and are said to be carriers of sickle cell trait. These people will more often live in the malaria belt of sub-Saharan Africa. The most likely explanation for this is ________. malaria is a cause of sickle cell trait people with sickle cell trait have a better chance of surviving malaria sickle cell trait is passed on to the biting mosquitoes as malaria There is no correlation between a single allele for the pathology and the ability to survive or fight malaria.
Answer: people with sickle cell trait have a better chance of surviving malaria.
Explanation:
Malaria is a very prevalent disease in the malaria belt of Sub-Saharan Africa which includes much of western and central Africa. The people here have therefore grown to have better immunity to malaria by developing the sickle cell trait.
This has helped them survive both malaria and sickle cell anemia which doesn't affect them even though they carry the sickle cell trait.
Which of the following is most efficient for mapping large areas of the ocean or the whole ocean floor? A. satellite imaging B. infrared imaging C. radio waves D. sonar
Answer
the answer is d. sonar
Question 10 of 34
Which of the following best describes the function of the human nervous
system?
A. The nervous system transports oxygen and nutrients to the body's
tissues,
B. The nervous system collects and responds to information about
the internal and external environment,
C. The nervous system protects internal organs and assists with
movement.
D. The nervous system protects the body against infection and helps
regulate body temperature,
Answer:
B. The nervous system collects and responds to information about
the internal and external environment,
Explanation:
The nervous system is the major controlling, regulatory, and communicating system in the body. It is the center of all mental activity including thought, learning, and memory. Together with the endocrine system, the nervous system is responsible for regulating and maintaining homeostasis.
Hormones are _____. See Concept 45.1 (Page) View Available Hint(s)for Part A signals that must interact with DNA in order to be effective chemical signals between cells, transported in blood or hemolymph always proteins are all under the control of the pituitary gland produced only in response to environmental stress
Answer:
The correct answer is - chemical signals between cells, transported in blood or hemolymph
Explanation:
Hormones are chemicals that make communication between cells and transfer the signals to various target cells. These are transported through the blood and lumph in their respective circulation so signals can reach to the surface or within the target cells and perform specific functions.
Hi, guys so I'm doing an experiment and need help finding out the types of variables. In my experiment, I am using a narrow straw, a wide straw, and some colored water to find out how different variables affect capillary action. I'm trying to find out what is the controlled variable, independent variable, and dependent variable.
Answer:
Controlled variable=coloured water
Dependant variable=amount of water
Independant variable=narrow and wide straw
Explanation:
Have a nice day
Answer:
The controlled variable is straws. Independent it the water and dependent is the capillary action.
Explanation:
The Independent variable is the water because its not chaninging thorughout the experiment and has no conqueunces on the other varibales. The controlled is the straws because you are controlling the different diameters in which the straws are (narrow/wide). Then as you change your controlled variable your dependent varible will change- which is the affect on capillary action.
Hope this helps.
Which autoimmune disease results in the destruction of beta cells in the
pancreas?
type 1 diabetes
pernicious anemia
celiac disease
rheumatoid arthritis
Name the element which used to produce the fungicide?
Answer:
Copper and Sulfur
Explanation:
Copper and sulfur are still widely used to produce the fungicide.
hope i helped :)
What would be the electrostatic force between two charges of equal magnitude if the distance between them is halved
Answer:
the forces between the two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them
Answer:
The force becomes 4 times as much when the distance is halved.
Explanation:
F1 = k*q1 * q2/r^2 = kq^2/r^2
F2 = kq^2/1 / (r/2)^2
Set up a proportion using F1/F2 as you reference.
Notice that you don't know any number that can be used in this equation. However k q^2 does not change as you move the two charges closer together. That being so, you can still show what happens to F1 and F2.
F1/F2 = 1/r^2 // 1/(r^2/4)
Take the denominator, invert the fraction and multiply. That creates another cancellation.
F1/F2 = 1/r^2 * r^2 /4 1
F1/F2 = r^2 // r^2/4 which allows you to cancel r^2
F1/F2 = 1/4 Now you need to interpret F1 and F2. Cross Multiply
4F1 = F2
What is "Radioactive Dating"?
A. A method of determining the age of a fossil that estimates the age of the organism at its death
B. A method of determining the age of a fossil based on the amount of certain isotopes that remain in a fossil or rock
C. A method of determining the age of a fossil that estimates how closely related various fossilized organisms were
D. A method of determining the age of fossil based on a comparison to the age of other similar fossils
Answer:
Unlike relative dating methods, absolute dating methods provide chronological estimates of the age of certain geological materials associated with fossils, and even direct age measurements of the fossil material itself.
2) ¿Cuál de los siguientes hechos no es una evidencia de una reacción química? a) Presencia de un catalizador b) Cambio de color d) Liberación de gas
Answer:
a) Presencia de un catalizador
Explanation:
Los dos tipos de cambios que experimentan las sustancias en la química son cambios químicos y físicos.
Un cambio físico es un cambio es un cambio en el que la sustancia cambia en su apariencia o su forma de una manera que es reversible y en la que no se forma una nueva sustancia.
Un cambio químico es aquel en el que hay un cambio en las sustancias presentes y se forma una nueva sustancia.
La evidencia de que ha tenido lugar un cambio químico incluye
1) La formación de un precipitado a partir de la mezcla de sustancias.
2) Un cambio en el color de las sustancias.
3) Un cambio en el olfato (que desprende un olor) o en el sabor.
4) La sustancia produce luz (brilla)
5) El volumen total cambia
6) Cambio de temperatura (la mezcla se calienta o enfría)
Por lo tanto, la presencia de un catalizador, que es una sustancia que no participa en una reacción pero aumenta la velocidad de reacción, no es evidencia de una reacción química.
How are protons and neutrons conserved as a star ages?
Answer:
Students identify that atoms are not conserved in nuclear fusion, but the total number of protons plus neutrons is conserved. ... Helium and a small amount of other light nuclei (i.e., up to lithium) were formed from high-energy collisions starting from protons and neutrons in the early universe before any stars existed.
do you find some fine strands or thread like structure
Answer:
Hyphae are thread like structure.....hope it's helpful.!pls mark me in brainlistWhy is it difficult to bond three phosphate groups to Adenosine?
They have the same charge and repel each other.
They form a strong attraction to each other.
They are like opposite poles of a magnet.
The energy is evenly dispersed across all three bonds.
The fruit of the mistletoe, a parasitic angiosperm, is a one-seeded berry. In members of the genus Viscum, the outside of the seed is viscous (sticky), which permits the seed to adhere to surfaces such as the branches of host plants or the beaks of birds. What should be expected of the fruit if the viscosity of Viscum seeds is primarily an adaptation for dispersal rather than an adaptation for infecting host plant tissues
Answer:
We should expect that the fruits should grow in population and spread more easily.
Explanation:
Like the relationship between bamboo and pandas, the relationship between the seeds and the beaks of birds should allow the seeds to spread to other areas more easily that would otherwise be a very gradual process if the seeds did not evolve its viscous ability.
write the names of hybrid layer variety of hen.
please answer the correct one.
I will mark as brain list
Answer:
These are some popular Hybrid Layers:
Bovans Goldline.
Copper Black (French Copper Marans / Rhode Island Red)
Black Tail, Gingernut Ranger (Rhode Island Red / Light Sussex)
Blue (Andalusian / Barred Plymouth Rock)
Amber (Rhode Island White / Rhode Island Red)
Warren, Marans Cuivre (Rhode Island Red / Marans cross)
Can someone please help me with this biology question?
Answer:
I think it's C. The female parent hemophiliac..eta
but I would wait for a second opinion
Phosphates have been banned in most dishwashing detergents in order to
protect the environment. Why were phosphates removed from dishwasher
detergents?
A. Because they buffer cells from extremes in pH
B. Because they increase the acidity of water and cause acid rain
C. Because they increase the salinity of water and pollute drinking
water
D. Because they cause algal blooms that starve fish of oxygen
Answer:
Option D
Explanation:
Seventeen states banned phosphates from dishwasher detergents because the chemical compounds also pollute lakes, bays and streams. They create algae blooms and starve fish of oxygen. ... It just wasn't feasible to make detergent with phosphates for some states and without them for others
Hello everyone, I need your help plz
Define the word Microbiology:-
Thx ^_^
Answer:
Microbiology is the study of microscopic organisms, such as bacteria, viruses, archaea, fungi and protozoa. This discipline includes fundamental research on the biochemistry, physiology, cell biology, ecology, evolution and clinical aspects of microorganisms, including the host response to these agents.
it is the branch of biology that studies micro-organisms (very small organisms). ... The scientific study of microorganisms. (biology) The branch of biology that deals with microorganisms, especially their effects on man and other living organisms.
the study of all living organisms that are too small to be visible with the naked eye. This includes bacteria, archaea, viruses, fungi, prions, protozoa and algae, collectively known as 'microbes'.
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Does skeletal connective tissue have nucleus?
Answer:
Fibroblasts are the most common cell type of connective tissue. They produce both fibers and amorphous ground substance. Typically only the oval nuclei are visible. ... In the tendon, fibroblasts are seen as elongate nuclei found sandwiched between collagen fibers .
three types of transpiration
Answer:
1) Stomatal Transpiration
2) Lenticular Transpiration
3) Cuticular Transpiration
OAmalOHopeO
Where does DNA transcription take place?
A. In the nucleus
B. In the cytoplasm
C. In the lysosomes
D. In the ribosomes
Answer:
A. In the nucleusTranscription uses the DNA to make RNA molecules.
Describe an equation which is the summary of the process by which a mesophlly cell gives out oxygen.
Answer:
An equation is math so i dont really know
Explanation:
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