the genes stc1 and stc2, which share a common ancestor, are found in both zebrafish and humans. all four stc genes display similar patterns of exon and intron sequences. based on these facts, what is the most likely explanation for the origin of stc genes?

Answers

Answer 1

Based on these facts, we can state that the genes of the two organisms had a eukaryotic origin.

We can arrive at this answer because:

Despite having exons, prokaryotes do not have introns in their genomes.This means that if two organisms have the same sequence of introns and exons, they have a common ancestor, in addition to having their genes originated in a eukaryotic organism, which explains the sequence of introns.

This means that the genetic expression of these two organisms has similarities, even if they are organisms with different biological processes.

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Related Questions

Which sentence best explains how a positive feedback loop affects climate
change?
A. As the number of plants increases, the amount of CO2 decreases.
B. High clouds have a high albedo and reflect solar energy back into
space.
C. As climate warms, CO2 increases because plants remove less of
it.
D. High precipitation results in increased plant growth, lowering CO2.

Answers

A positive feedback loop that affects climate is change as the number of plants increases, the amount of CO2 decreases.

The more trees the less CO2?

Scientists agree that one of the most effective ways to absorb part of the CO2 from the atmosphere would be to plant more trees, as they use CO2 to grow and release oxygen, this action brings benefits to the entire environment.

With this information, we can conclude that A positive feedback loop that affects climate is change as the number of plants increases, the amount of CO2 decreases.

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How do animals cause erosion.

Answers

Answer:

Some animals weather rocks by scraping them as they feed. Other animals change Earth's surface by burrowing into it and moving material. Too many animals in one place can destroy most of the plants, leading to faster erosion.

If too many animals graze the same land area, the animals’ hooves pull plants out by their roots. A land is overgrazed if too many animals are living there. Grazing animals can cause erosion if they are allowed to overgraze and remove too much or all of the vegetation in a pasture.

Explanation:

Hope this helped :)

Hi can someone plss help me with this!!

Answers

Explanation:

4. evaporates , ocean

8. transpiration,

9. acid rain

in what ways does transformation play a role in stories meant to scare us essay

Answers

Answer:

Transformation can play a big role in frightening stories because transformation in and of itself can be frightening. This process involves the unknown and a loss of control, two things that very much tend to frighten human beings who prefer the familiar and secure.

an adaptation of the epithelial cells of the proximal convoluted tubule for reabsorption is

Answers

Answer:

microvilli

Explanation:
having microscopic projections called microvilli. The epithelial cells of the proximal convoluted tubule are adapted.

identify the three types of symbiotic relationships and give an example of each in your answer be sure to describe the relationship

Answers

Answer:

mutualism, commensalism, and parasitism

Explanation:

mutualism, commensalism, and parasitism

What is the role of density changes in a convection cycle

Answers

Answer:

Explantion

Convection is heat transfer due to a density differential within a fluid. As water's temperature increases in the presence of a heat source, it will become less dense and rise. As it moves up and away from the heat source, it cools and becomes more dense and sinks. ... Air from above the ocean is colder and more dens

Convection is the transfer of heat caused by a density difference within a fluid. Water becomes less dense and rises as its temperature rises in the presence of a heat source.

What is convection?

Convection is a method of moving heat that is also known as a heat transfer mechanism. When a fluid, such as air or water, is in motion, heat is transferred. Temperature differences across the fluid drive convection.

Differential heating causes convection currents. Warmer (less dense) material rises, while cooler (more dense) material sinks.

This movement is responsible for the formation of circulation patterns known as convection currents in the Earth's atmosphere, water, and mantle.

Convection is the heat transfer resulting from variations in density within a fluid. In the presence of a heat source, water becomes less dense and rises in density.

Thus, this is the role of density changes in a convection cycle.

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What two products result from photosynthesis?.

Answers

Answer:

glucose and oxygen

Explanation:

i hope this helps

What organism belongs to the Prokaryotic domain of life and it comes in three different
shapes, such as cocci, rod, and spiral?

Answers

Answer:

eubacteria

Explanation:

I took the quiz :)

The organisms that belong to the Prokaryotic domain of life and it comes in three different shapes, such as cocci, rods, and spirals are known as Eubacteria.

What do you mean by the Prokaryotic domain?

The prokaryotic domain may be characterized as the kingdom of Prokaryotes is significantly made up of two domains namely, Archaea and Bacteria. These eubacteria are classified under the domain of bacteria which is represented by the relation based on the DNA experimental approach.

According to the context of this question, there are mainly three types of eubacteria commonly found. They are round (coccus), rod-like (bacillus), comma-shaped (vibrio), or spiral. All these types of different body plans, structures, and functions with respect to their morphology.

Therefore, eubacterium is a type of organism that belongs to the Prokaryotic domain of life and it comes in three different shapes, such as cocci, rod, and spiral.

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the organ that transfers nutrients and oxygen from mother to embryo is called the

Answers

Answer:

The fetus is connected by the umbilical cord to the placenta, the organ that develops and implants in the mother's uterus during pregnancy. Through the blood vessels in the umbilical cord, the fetus receives all the necessary nutrition, oxygen, and life support from the mother through the placenta.

which set of details correctly identifies a series of events in a sympathetic pathway?

Answers

Answer:

Thoracolumbar origin, short preganglionic fiber, ACh release at ganglion, long postganglionic fiber, NE release at effector

Number 4……………………………..

Answers

If the new gene "works", then it will synthesize a missing enzyme or structural protein. A gene is a protein-coding nucleotide (DNA) sequence.

A gene is a fragment of DNA that is used by the cell to create a complementary mRNA sequence by a process called transcription.

Subsequently, this mRNA is then used to synthesize a protein by a process called translation.

When a gene is defective, a change in the nucleotide sequence (i.e., a mutation) can restore normal gene function and thus produce a functional protein.

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Newly hatched birds that lack down and are nest-bound, unable to feed on their own, as with baby wrens or robins, are Group of answer choices carinate. altricial. derived. ratites. precocial.

Answers

Newly hatched birds that lack down and are nest-bound, unable to feed on their own, as with baby wrens or robins, are ALTRICIAL. These species include hummingbirds, swallows, passerine birds, woodpeckers, etc.

In altricial species, young individuals are underdeveloped at birth, thereby needing the help of parents to mature and develop into adult individuals.

Conversely, precocial species are species in which young individuals are mature and mobile from the moment of birth.

Most domestic species of birds (i.e., ducks, turkeys, chickens, etc) have a precocial type of development.

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In order to see cells clearly in a section of plant tissue, which magnification would you have to use? А x5
B x 10
С X100
D X1000 ​

Answers

Ratio

L guess you idiot

Which of the following is/are producers?
SELECT ALL THAT APPLY
a certain fungi
b certain bacteria
call plants
d algae

Answers

Answer:

Ans- B)certain bacteria

C) all plants

D) Algae

Producers:the organism which make their own food.Also known as autotrophs.

(c)
In the human body, glucose is absorbed into the blood from the small intestine.
The small intestine contains many villi.
Which two of the following help the absorption of glucose in the small intestine?
Tick () two boxes.
Villi have a cell wall.
Villi are covered in thick mucus.
Villi give the small intestine a large surface area.
Villi have many blood capillaries.
(2)
Total 7 marks)

Answers

Answer:

villi is used and is very imp as it has structure like finger type which help for increase in surface area for more absorption and less wastage of water/minerals

Answer:

villi have a cell wqll

Explanation:

white rami carry _________ neurons, while gray rami carry _________ neurons.

Answers

Answer: myelinated preganglionic, unmyelinated postganglionic

Explanation:

Just took the test

what is an important function of the urinary system?

Answers

Answer:

the kidneys are the most important function of the urinary system

Explanation:

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IQ is determined by:(1 point)


multiple genes only

both a single gene and environmental factors

a single gene only

multiple genes and environmental factors

Answers

IQ is determined by ;  ( D ) multiple genes and environmental factors

IQ ( intelligence quotient  ) is influenced by more than a single gene ( i.e. multiple genes ) and this makes IQ a polygenic trait found in organisms such as humans.

IQ is not only determined by multiple traits but is strongly influenced by environmental factors just like the multiple genes. IQ measures the intellectual ability of humans ( i.e ability to read and think critically outside the box and also think logically . )

Hence we can conclude that IQ is determined by multiple genes and environmental factors

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Answer:

multiple genes and environmental factors

Explanation:

how do scientists know that mountains were once at the bottom of the ocean

Answers

Answer:

Its more then likely that they do and they were the ones that found that out. but im not 100% sure

What condition occurs when epidermal cells are created too quickly? a. Acne c. Psoriasis b. Skin cancer d. Chicken pox.

Answers

The condition that occurs when epidermal cells are created too quickly is known as psoriasis. In this disease, the cell cycle of skin cells is abnormally accelerated.

Psoriasis is a skin disease associated with itchy patches of thick, red skin, especially in the knees, trunk, and scalp.

Psoriasis is an autoimmune disease caused when the immune system attacks healthy skin cells.

Psoriasis is well characterized by hyperproliferative keratinocytes, which are the most prominent type of cell within the epidermis.

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Why do parasites not require complex nervous or muscular tissue?

Porque los parásitos no requieren tejido nervioso o muscular complejo?

Answers

Answer:

Hey mate.....

Explanation:

This is ur answer.....

Poorly developed nervous and muscular systems – because parasites live inside their hosts, they don't need eyes, ears or a keen sense of smell to detect potential predators nor a brain to facilitate escape. They have little need for a muscular system because they have no place to go. 

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100!!! POINTS!!!!
On the map, take a close look at the boundary along southern California and Mexico’s Baja California Peninsula. The arrows on the map show the direction and speed of the plates along this boundary in millimeters per year. Based on the speed and direction of the arrows, identify the type of plate boundary at this location. Which landforms or events are likely to occur there as a result? (Hint: It may be helpful to model the motion of the plates using your hands or pieces of paper.)

Answers

Explanation:

Thus, at convertgent boundries, continental crust is created and oceanic crust is destroyed. Two plates sliding past each other forms a transform plate boundry

The area around the convergent boundries, continental crust is created then the oceanic crusts were destroyed.

What are land forms?

The term land form is used to describe the physical features that describe the geography of any particular area.

Looking at the map, in the area around the convergent boundries, continental crust is created then the oceanic crusts were destroyed.

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Identify the main gas that diffuses from the alveolus to the capillary.

Answers

Answer:

oxygen

Explanation:

Why does pollution become more than a local problem?

Answers

it can kill

Explanation:

The reason it is a universal problem is because it can kill animals and polute the ocean and then clog up a boat engine

Pollution can influence ALOT of change. A negative change that is outside “local problems”. Pollution affects human health, and animal health across the world.

what is most likely the cause of this difference from the rest of the population

Answers

Answer:

Gene mutation is most likely the cause of this difference from the rest of the population. Log in for more information.

Explanation:

CAN I GET BRAINLIEST

PLZZZZZZZ help me and thank you

Answers

Answer:

it's in the book hehe 11111111111111

In experiments with competitive barnacle species distributed along upper and lower intertidal zones, researchers found a trade-off between ability to _____ and ability to _____.

Answers

In this case, researchers observed a trade-off between the ability to tolerate harsh dry conditions and the ability to colonize deeper water. This type of trade-off can increase the fitness of only one phenotypic trait.

An evolutionary trade-off can be defined as an evolutionary mechanism where a trait can increase its adaptive fitness in the detriment of decreased adaptive fitness in another phenotypic trait.

In trade-offs, the evolutionary adaptive processes cannot optimize a given trait without compromising another.

A well-known example of an evolutionary trade-off is the balance between the number of eggs that a bird can produce in a determined clutch.

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specific enteroendocrine cells of the stomach, called g cells, are stimulated by partially digested proteins, caffeine, and rising ph. when stimulated, g cells secrete ________.

Answers

when stimulated, g cells secrets oocytes

the mycelium is a mesh of filaments, each of which is called

Answers

The mycelium is a mesh of filaments, each of which is called a hypha
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