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Answer:

Down syndrome in humans is due to ADDITIONAL, PARTIAL OR FULL COPY of the 21 st chromosome.

Explanation:

Down syndrome is a genetic disorder in which an individual has a total of 47 chromosomes instead of 46 that is, 23 pairs of chromosomes which is found in normal individuals. This occurs as a result of the presence of additional, partial or full copy of chromosome 21. There are generic variations that occurs in chromosome 21 leading to down syndrome, these include:

-->Trisomy 21 : the individual has three copies of chromosome 21 instead of two copies due to abnormal cell division that occurred during development of sperm or egg.

--> Mosaic Down syndrome: the individual has some cells with an extra copy of chromosome 21 and it's caused by abnormal cell division after fertilization.

--> Translocation down syndrome: This type of down syndrome occurs when chromosome 21 gets attached to another chromosome which occurs during or after conception.

Generally the symptoms due to the presence of this extra genetic material includes:

--> short heights

--> poor muscle development

--> short neck

--> short fingers with small hands and feet

--> increased risk to development of dementia

--> greater tendency to develop obesity

all of these are equally important, what if there is an option for natural selection, natural selection would be the most important but for this it's all these are equally important.

The critical factor driving evolution is strength in comparison to similar organisms.

According to Charles Darwin, Organisms that are better able to survive in their environment live long enough to reproduce and pass on these favorable traits to their offspring leading to the perpetuation of these organisms and gradual demise of other individuals of the same species who lack these favorable traits.

This is the origin of the cliché, "survival of the fittest". Hence organisms that lack certain strengths possessed by other organisms are gradually replaced  by other individuals having such strengths.

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Answer:

the new cells that arise after cell division are called daughter cells.

Answer:

We can immediately cross-out C

We can also cross-out  A.

Now we have B and D.  Commensalism and Mutualism. Now, commensalism is an association between two organisms in which one benefits and the other derives neither benefit nor harm.

Mutualism is the doctrine that mutual dependence is necessary to social well-being.

I would say D: Commensalism​. Both fish can survive without each other.  

Answer:

They represent the percent chance to inherit a type of genotype. Recessive alleles, dominant alleles, heterozygous have chances to appear based off the parent alleles.

Answer:

1. An evolutionary trait that is homologous within groups of organisms (see homology) that are all descended from a common ancestor

2. Derived traits are those that just appeared (by mutation) in the most recent ancestor -- the one that gave rise to a newly formed branch.

3. A cladogram uses lines that branch off in different directions ending at a clade, a group of organisms with a last common ancestor.

4. It helps us to form a cognitive framework of understanding complexity.

5 Because it is a learned trait. For some domains, like Bacteria and Archeabacteria, DNA is transferrable

6. A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.

7 Polyhedral, Helical, Complex, Spherical

8. Sometimes referred to as temperate or non-virulent infection, does not kill the host cell, instead using it as a refuge.

Explanation:

Hope that helps sorry I could not get all of it done, but I am busy doing my school work

Answer:

Cystic Fibrosis is a chronic, genetic condition that causes patients to produce thick and sticky mucus, inhibiting their respiratory, digestive, and reproductive systems. Like Thalassemia, the disease is commonly inherited at a 25 percent rate when both parents have the Cystic Fibrosis gene.

Answer: All have calcium made structures which restricts their degradation and decomposition.

Explanation:

Echinoids and snails have exoskeleton which is hard and made up of calcium carbonate which is the least degradable material even after death of the organisms and remains as traces and remains in the fossils. Also the shark tooth is made of dentin which is a hard calcified tissue which does not decompose very easily. It is denser and harder then the bones. It is surrounded  by the enamel shell. The dentin and enamel prevent the degradation and decomposition of the shark tooth for long hence, it gets available as fossil.

Answer: The Cerebellum's Granule Cell is the smallest cell in the human body that is between 4 micrometers to 4.5 micrometers long.  

Explanation:

Answer:

The Cerebellum's Granule Cell

Answer:

The 3 smallest bones in the human body--malleus, incus, and stapes--are located in the middle ear. At 3 x 5 mm in size, the stapes is the smallest bone in the human body.

Answer:

What is the smallest bone in the human body? The 3 smallest bones in the human body--malleus, incus, and stapes--are located in the middle ear. At 3 x 5 mm in size, the stapes is the smallest bone in the human body.

Answer: Then you are deid

Explanation: Not big suprise

Answer:

well you cant actually ate yourself because your body won't fit at our mouth also it will hurt

Answer:

Venus

Explanation:

The closer a planet is to the Sun the faster it moves because the Sun can exert more gravitational force on it. Venus is the second closest planet to the Sun therefore the fastest out of the options.

Its Venus.

It is closer to the sun than the other planets on here.

Answer:

Census

Explanation:

A census is a study that obtains data from every member of a population. In most studies, a census is not practical, because of the cost and/or time required.

Hope this helps!!!

Answer: Territorial behaviour, in zoology, the methods by which an animal, or group of animals, protects its territory from incursions by others of its species. Territorial boundaries may be marked by sounds such as bird song, or scents such as pheromones secreted by the skin glands of many mammals.

Explanation:

Answer:

Wolves work together to chase or kill any wolves that are not in

their group

Explanation:

Many animals rely on smells to mark their territories, spraying urine, leaving droppings or, rubbing scent glands around the territories' borders. Approaching animals will be warned off the territory without ever encountering the territory's defender.

Answer:

I am not sure what you are looking for but some food is limited due to the pandemic and I am having a hard time obtaining certain goods.

Explanation:

Answer: A mutation is a change in a DNA sequence? Mutations can result from DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.

Explanation:

The most common genetic mutation is, In fact, the G-T mutation.

Answer:

Cell provide structure and support to the body of an organisms

Answer: They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body's hereditary material and can make copies of themselves. Cells have many parts, each with a different function. brainliest?

Explanation:

Answer:

Homologous chromosomes are two pieces of DNA within a diploid organism which carry the same genes, one from each parental source. Basically, it's two pieces of DNA from your mom and dad that form who you are.

Explanation:

Answer:

UUC AUA GCU CCA ACU GGA UAG

Explanation:

Answer:

A. Carotene

Explanation:

It is an orange/red pigment which is seen during the fall.

Answer:

Wildfires that burn into areas where fuels have been reduced by prescribed burning cause less damage and are much easier to control. ... The time interval between fires can be as often as every year although a 3- or 4-year cycle is usually adequate after the initial fuel-reduction burn.

Explanation:

Hope it helps! Correct me if I am wrong!

I'm sure about my answer!

If you dont mind can you please mark me as brainlest?

Its ok if you don't want to!

But i hopefully it helps you!

Answer:

0.42

Explanation:

To estimate the frequency of alleles in a population, we can use the  

According to this equation:-

p =  

q =  

p + q = 1.0  

(p + q)  

2

 = 1 so p  

2

 + 2pq + q  

2

 = 1

p  

2

2pq = frequency of Aa  

q  

2

p+q = 1

0.3 + q = 1

q = 1 - 0.3 = 0.7

Aa = 2pq = 2* 0.3 * 0.7 = 0.42.

Answer:

It is the sun in most ecosystems as the light energy is fixed during photosynthesis and then transferred to other organisms via the food chain.

Explanation:

I hope it helps

have a nice day

#Captainpower

Answer: blank 1: rotates

blank 2: gravity

Explanation:

Answer:

diurnal means awake during the day, and use the light to their advantage

nocturnal active at night.

Explanation: Diurnal means active during the day, such as a mosquito meanwhile, a nocturnal animal or being is only active during the night, and sleeps the day away, such as a bat

Hope this helps ^^

Diurnal means awake during the day time, and use the light to their advantage. Nocturnal means active at night time. Thus, the correct options will be A and B.

Based on the activeness of an organism during a day or 24 hours time period, the animals or organisms can be classified into two different types which are nocturnal and diurnal organisms. Nocturnal animals are the animals which are most active during the night time, and diurnal animals are the animals which are active during the daytime.

Diurnal animals are those animals which are awake during the day time, and use the light energy to their advantage. Nocturnal animals are the animals which are active at the night time.

Therefore, the correct options will be A and B.

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#SPJ3

Answer:

community

Explanation: