Explain why tongue rolling ability is a discontinuous variation
Since tongue rolling ability is determined by a single gene with two separate alleles—the dominant allele, which codes for tongue rolling ability, and the recessive allele, which codes for tongue rolling incapacity—tongue rolling ability is a discontinuous variation.
What is Tongue rolling ability?The hereditary characteristic known as tongue rolling ability controls whether or not a person can roll their tongue into a tube shape. This characteristic is frequently used as an illustration of a straightforward hereditary trait with discontinuous variation since there are only two possible outcomes: either a person rolls their tongue or they do not.
Either a person has the recessive allele, which prevents them from rolling their tongue, or they have the dominant allele, which allows them to roll their tongue. There is no intermediate or in-between trait, and the presence or absence of the dominant allele is a distinct, plainly observable phenotype.
Therefore, the capacity for tongue rolling is an illustration of a discontinuous variation.
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What ratio of plants in the offspring would you predict from a Yy x Yy cross?
Answer:
The correct answer is -
The genotype of offspring - 1:2:1 (YY:Yy:yy)
The phenotype of offspring - 3:1 (dominant trait: recessive trait)
Explanation:
In this question, it is stated that there is a cross between Yy and Yy. By the genotype of the parents, we can say that Y is dominant for a particular trait and y is recessive and the parents are in the heterozygous condition in this cross. The gametes these parents will produce are - Y and y and Y and y
then the cross of Yy and Yy would be -
Y y
Y YY Yy
y Yy yy
Offspring from this cross are YY, Yy, Yy, and yy which means the genotypic ratio is - 1:2:1 and the phenotypic ratio is - 3:1 as three out of four are dominant.
How can two physically healthy parents produce a child with Down syndrome and a second child with Klinefelter syndrome?
1. There are
domains.
1
2
3
4
Answer:
3
Explanation:
There are three domains of life, the Archaea, the Bacteria, and the Eucarya.
Answer:
There are 3 domains
Explanation:
the Archaea, the Eucarya, the Bacteria.
Which of the following is a property of water? (4 points)
It can dissolve only acids.
It expands when it melts.
It exists naturally in only in two states.
It has a low surface tension.
It stores heat energy well.
Answer:
QUESTION NUMBER THREE DONEE YA BOIIIIIIIIII
Explanation:
Why do ionic compounds conduct electric current when they are dissolved in water?
The diameter of a circle is 6 miles. What is the circle's circumference?
Answer: C=18.85
Explanation: c/circle, hope this helped
write downany two organisms which shows binary fission
Answer:
Amoeba and Paramecium
Answer:
Amoeba,
Euglena
Explanation:
In biology, binary fission is a type of asexual reproduction where a parent cell divides, resulting in two identical cells, each having the potential to grow to the size of the original cell. ... Binary fission is common among prokaryotes, e.g. archaea, eubacteria, cyanobacteria, and certain protozoans (e.g. amoeba)
HELPPP!!!! Which element is also an air
pollutant?
A. copper
B. lead
C. silver
D. zinc
Answer:
lead
Explanation:
Lead element is also an air pollutant. Thus option B is correct.
What are the air pollutants?
Any physical, chemical, or biological changes in air due to contamination by incorporation of harmful gases, dust, and smoke causes air pollution.
The imbalance in the gaseous concentration in air lead to global warming.
There are two major types of air pollutants such as Primary and Secondary Pollutants,
Primary pollutants cause air pollution directly and secondary pollutants are generated by intermingling of primary pollutants.
Lead, Fly Ash, Metallic Oxides, Nanoparticles, Carbon monoxide (CO), Carbon dioxide (CO2), Chlorofluorocarbons (CFCs), Ozone (O3), Nitrogen oxide (NOx), Sulphur dioxide (SO2) are some examples of air pollutants.
A hazardous heavy metal called Lead can cause serious damage to different physiological system of the human body like nervous system damage, Digestive system, affect kidney.
It can also cause cumulative food poisoning. Hence, Lead was banned to add fuels. Thus option B is correct.
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Species like fish and turtles have many predators. These species produce more offspring than will survive. Which of the following correctly addresses an advantage and disadvantage of the overproduction of offspring?
Species have an increased chance of survival and parents are able to care for the young.
Competition of resources in the environment is reduced and species have a decreased chance of survival.
Overproduction of one species can threaten another species and species can become resistant to medicine.
Populations of species have increased genetic variation and competition for resources in the environment is increased.
Answer:
D?? I hope this helps.
Explanation:
When a crocodile has birds in its mouth, what symbolic relationship does it represent?
Answer:
The symbiotic relationship between the crocodile and the plover bird is exemplary of two organisms working together. The plover bird flies inside the crocodile's mouth, which may seem dangerous for the bird and food for the crocodile
Explanation:
Which of the following scenarios represents change to an ecosystem brought about by biotic factors?
a.
a wildfire caused by lightning striking a tree
b.
a flood caused by a severe storm
c.
a landslide caused by cattle overgrazing
d.
a volcano
Please select the best answer from the choices provided
A
B
C
D
Answer:
C
Explanation:
BRAINLIEST!! 5 STARS AND A THANKS!!
Who finally provided enough evidence for the theory of plate tectonics to be widely accepted, and where was this evidence found?
Answer:
Alfred wegener was the one that provided the evidence for plate tectonics
Answer:
Alfred Wegener
Explanation:
German meteorologist Alfred Wegener is often credited as the first to develop a theory of plate tectonics, in the form of continental drift.
Why is taxonomy important to scientists?
in prophase 1 of meiosis, crossing over results in
Answer:
Crossing over results in Genetic Recombination.
Explanation:
Evidence exists that during the millions of years in which the Grand Canyon formed, the canyon divided a single population of tufted-eared squirrels into two populations. One of these squirrel populations, the Kaibab squirrel, now lives in isolation from the other tufted-ear squirrels on the North Rim of the canyon. The other population, the Abert's squirrel lives on the South Rim. Some biologists think that the two populations of squirrels have evolved into two separate species. Other biologists think that the Kaibab squirrel is a subspecies of the Abert's squirrel.
Answer:
A few of the squirrels manage to cross the canyon and breed with the squirrels on the other side.
Explanation:
The formation of the canyon divide the population of the tufted ear squirrels into two different population or species of the squirrels. One is the Kaibab squirrel which lives in the north Rim of the canyon while the other is the Albert's squirrel that lived in the South Rim.
The Kaibab squirrel has a black belly, white tails and tufted ears while the features of the Albert's squirrel is that it has white belly, white tail and tufted ears.
Now the factors that could make the evolution or the formation of the squirrel population in two different species less likely is the few of the squirrels might have crossed the Grand Canyon and moved to the other part and breeded with the squirrels there. So both the species have somewhat similar features.
Describe the role that the protein INSULIN plays in a red blood cell
Answer:
helps maintain blood sugar
:)
Explanation:
The beta cells of the pancreas produce a peptide hormone called insulin. It is an anabolic hormone that regulates the activity of proteins, fats and carbohydrates in the body.
In blood cells insulin helps to:
Keep blood glucose levels
The role can be explained as:
Insulin is the anabolic protein that helps in breaking down carbohydrates, fats and proteins consumed in food. They signal the muscle and liver cells to absorb the glucose molecules present in the blood.They help the cells and tissues to regulate the glucose uptake for energy and also to store the excess glucose as a glycogen molecule.When there is an increased glucose concentration in blood cells then insulin cues liver cells to convert it into glycogen for future use.In the case of insufficient blood glucose it alerts liver cells to split the glycogen molecule into glucose for furnishing power and to counteract out the equilibrium in the body.Therefore, insulin regulates blood glucose levels.
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Which of the following is NOT a primary mineral?
A. Mica
B. Feldspar
C. Quartz
D. Limestone
Answer:
D
Explanation:
limestone isn't a primary mineral
Question 8
How can humans help to reduce ocean acidification?
a
Eat more fish so they will not breath so much carbon dioxide into the sea water.
b
Add chemicals to the ocean which will help to change the pH.
c
Reduce the amounts of fossil fuels used in industry and transportation.
d
Stop throwing plastics in the ocean.
Answer:
D
Explanation:
Because I learned this in Harvard
Answer:
C, Reduce the amounts of fossil fuels used in industry and transportation.
Explanation:
A makes no sense, B the chemcials can kill certain speices living in the ocean, and D plastic is oil, and oil isn't acidic (it's neutral- it isn't a base of an acid).
A student claims that the lac operon is an example of a mechanism that an organism uses to conserve energy. Evaluate the validity of the student's claim. The claim is invalid because the lac operon requires a bacterial cell to produce extra regulatory proteins and regulatory segments of DNA. The claim is valid because the lac operon allows a bacterial cell to shut down a metabolic pathway if it is not immediately needed. The claim is valid because the lac operon allows a bacterial cell to maintain constant levels of enzymes even when they are not immediately needed. The claim is invalid because the lac operon requires a bacterial cell to constantly produce the lac repressor protein even when lactose is not present.
Answer:
The claim is valid because the lac operon allows a bacterial cell to shut down a metabolic pathway if it is not immediately needed.
Explanation:
The lac operon is a cluster of genes which contain the same promoter sequence and are transcribed as a single messenger RNA (mRNA). This operon is inducible because the presence of lactose in the cell influences its transcription. Lactose can bind to the repressor of this operon, leading to a conformation change in the repressor, thereby preventing the repressor from binding to the operator and thus allowing transcription of the structural genes. After lactose addition, the β- galactosidase enzyme can break this carbohydrate into glucose and galactose, thereby there is no lactose able to bind with the repressor and therefore this operon shuts down. During transcription, the promoter of the lac operon binds both RNA polymerase and catabolite activator protein (CAP) and cyclic AMP (cAMP) complex.
What is the MAIN difference between prokaryotic (bacteria) cells and eukaryotic cells?
A. Presence of Cell membrane
B. Presence of Nucleus
C. Presence of Cell Wall
D. Single-Cell vs Multicellular organisms
Answer:
Single cell vs Multicellular organisms
Explanation:
A prokaryote is a single celled organism such as bacteria, whereas eukaryotes are multicellular beings, such as humans and other forms of life made up of multiple cells.
Why is the pituitary gland called the master gland?
O It is the largest gland in the body.
It regulates the work of many glands in the body.
O It helps the brain master higher-level thinking processes.
It controls the heart, which is the master pumping organ in the body.
Answer:
THE CORRECT ANSWER IS B(It regulates the work of many glands in the body.)
Explanation:
Pituitary gland is known as the master gland because it influences the functioning of other glands like thyroid, testes, ovary etc for it's functioning as endocrine gland.
HOPE THIS HELPS!!!!!!
The pituitary gland called the master gland because it regulates the work of many glands in the body.
Why is the pituitary gland called the master gland?The pituitary gland is also called the "master" gland of the endocrine system because it controls the functions of other endocrine glands. The pituitary gland is located at the base of the brain.
So we can conclude that the pituitary gland called the master gland because it regulates the work of many glands in the body.
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What are some warming behaviors an animal might perform to warm its body temperature up?
Which food preservation technique is Paul using?
Paul uses____ technique, which is the most modern technique of food processing and preservation. This technique uses____ rays to kills Insects, mlcrobes, bacteria, and fungi In food.
1. Freeze drying
2. Irradiation
3. Dehydration
__________
1. Alpha
2. Beta
3. Gamma
Answer:
Paul uses Irradiation. The technique uses gamma rays
Explanation:
Answer:
Agreed.
irradiation
gamma
Explanation:
Difference between phagocytes and red blood cells
Products that we get from our ecosystems that we can use, buy, or sell; are which type of ecosystem service? Group of answer choices, Provisioning services, Supporting services, Cultural services, or Regulating services.
Answer:
Provision Services
Explanation:
A provisioning service is any type of benefit to people that can be extracted from nature. Along with food, other types of provisioning services include drinking water, timber, wood fuel, natural gas, oils, plants that can be made into clothes and other materials, and medicinal benefits.
ASAP Arizona deserts have been transformed by: chemical fertilizers use of pesticides irrigation canals recycling plants
this is all the points i have 88
Answer:
irrigation canals
Explanation:
Answer:
irrigation canals
Explanation:
Which is a valid claim about how meiosis I differs from meiosis II?
Answer:
Homologous pairs of cells are present in meiosis I and separate into chromosomes before meiosis II. In meiosis II, these chromosomes are further separated into sister chromatids. Meiosis I includes crossing over or recombination of genetic material between chromosome pairs, while meiosis II does not.
Explanation:
Hope this helps pls mark brainliest!!!
New alleles can arise in both asexual and sexual reproduction.
Which of the following statements is TRUE based on the disadvantages of sexual and asexual reproduction.
A- Gametogenesis is the only source of genetic variation for sexual reproduction
B- This answer choice is wrong
C- Mutations are the only source of genetic variation for asexual reproduction
D- Meiosis is the only source of genetic variation for sexual reproduction
Answer:
C - Mutations are the only source of genetic variation for asexual reproduction
Mutations are the only source of genetic variation for asexual reproduction.
What is mutation?
A mutation is a change in the DNA sequence of an organism. Mutations can result from errors in DNA replication during cell division, exposure to mutagens or a viral infection.
Germline mutations (that occur in eggs and sperm) can be passed on to offspring, while somatic mutations (that occur in body cells) are not passed on.
A mutation is never so advantageous in real life that it makes someone a superhero or does anything strange like give them wings. There are numerous explanations for why mutations typically don't have significant effects.
Therefore, Mutations are the only source of genetic variation for asexual reproduction.
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A(n) what is a chemical produced by one animal to influence the
behavior of another animal of the same species?
Explanation:
The answer is ( faramones). for mating purposes..