Answer:
Post reproductive isolation → Hybrid sterility
Explanation:
The biological concept of species states that individuals of a species can not mate and reproduce with individuals of another species. But if they get to reproduce, the progeny will not be viable or fertile. There will not be any reproductive success.
There are different reproductive isolation mechanisms, which are barriers that inhibit or interrupt the genetic flow between different species.
Reproductive barriers are isolation mechanisms that prevent mating between two or more species. The prezygotic mechanism avoids fertilization between individuals of different species, while the postzygotic mechanism impedes the zygote to develop and reach the adult stage.
Postzygotic mechanisms or barriers include
Hybrid inviability, Hybrid sterility, Hybrid decreased viability or fertility, Cytoplasmic interactions.In the exposed example, it seems that the mountains separating the frogs´ populations made a place for the development of postzygotic barriers, specifically hybrid sterility. Frogs from one population get to mate and produce offspring with the frogs of the other population, but their progeny is sterile.
ASAP
This organelle has a green pigment that absorbs sunlight.
A. Mitochondrion
B. Chloroplast
C. Vacuole
D. Ribosome
The organelle the question is referring to is called the chloroplast. I hope this helps; have a good evening!
Some of the typical properties of cancer cells are: (1) Self-sufficient growth and proliferation, (2) Defects in intracellular control mechanisms that normally arrest or permanently stop cell division in response to stress or DNA damage, (3) Ability to escape from home tissues (invasiveness) and to survive and proliferate in foreign sites (metastatic ability), and (4) Instability of the genome. True or False
Answer:
True
Explanation:
Cancer cells are abnormal cells that divide aggressively to form solid tumors, thereby differing from normal cells. Cancer cells do not need any stimulation to multiply them, i.e., they can synthesize their own growth factors that trigger uncontrolled cell proliferation. Mutations in genes associated with the progression through the cell cycle and programmed cell death (i.e., apoptosis) are a well-known hallmark of cancer cells. The mutated genes can be either 1-tumor suppressor genes that slow down cell division and repair DNA mistakes or 2-proto-oncogenes that normally help cells grow, and whose mutations cause normal cells to become cancerous (oncogenes are mutated forms of proto-oncogenes). Cancer cells are characterized by their invasiveness and metastatic potential, i.e., their ability to spread to healthy surrounding tissues through the lymph system and/or bloodstream, where these cells proliferate and produce new tumors. Finally, genomic instability, i.e., the increased susceptibility of cells to acquire and spread mutations at the genome level, is also a hallmark of cancer cells. Genomic instability results from damage to genes that regulate cell division and tumor suppressor genes.
4. Which is an environmental factor that affects skin color in humans?
A. number of linked genes
B. number of genes inherited
C. amount of food consumed
D. amount of sunlight absorbed
Answer:
Option D
amount of sunlight absorbed
The receptor of sound waves in the ear is the
O a. pinna.
O
b. ossides.
O c. organ of Corti.
O d. tympanic membrane.
Mrs. Tuff is now insistent that Tommy sits in her lap and as she speaks to Tommy he begins to cry more and refuses to open his mouth. Mrs. Tuff continues to tell Tommy that it won't hurt and if he only opens his mouth, he will get a toy. What steps can you take now to get Tommy to cooperate?
Solution :
Tommy is a young boy and is feeling afraid to open his mouth and show it to Mrs. Tuff. Something had stuck into his mouth and he is finding it difficult to eat anything and it is paining a lot.
Mrs. Tuff is insisting tommy to sit on her lap so that she could examine him but he refuses to open his mouth and cries loudly. I told Tommy that it is for his own good and he should listen to Mrs. Tuff and open his mouth so that Mrs. Tuff could treat him. By this Tommy will get relief from his pain and he will better.
I also insisted Tommy to open his mouth as it will cause him any pain. I gave something to Tommy so he can get distracted and open his mouth. Mrs. Tuff also told him that he will get a toy if he opens his mouth.
This is how I got Tommy to cooperate with Mrs. tuff.
Which of the following statements is correct with respect to the photosynthetic pathway of grass or a cactus?
Answer:
Where are statement
Explanation:
Please tell
The following illustration shows a food web for a kelp forest off of the coast of California. What do you predict would happen to the kelp population if the sea otter population declined?
The kelp population would decrease: sea otters eat urchins, and urchins eat kelp.
The kelp population would increase: sea otters eat urchins, but not exclusively.
The kelp population would remain unchanged; sea otters do not eat the kelp.
The kelp population would remain unchanged: sea otters eat urchins, but not exclusively.
Answer:
The kelp population would decrease: sea otters eat urchins, and urchins eat kelp.
Explanation:
The diagrammatic illustration in this question is showing a food web made up of a variety of species feeding on one another. As shown in the food web, sea otters are one of the top predators that can eat a wide variety of organisms.
Sea urchins feed directly on kelp, however, the population of sea urchins can be controlled by sea otters which feed on sea urchins. Hence, if population of sea otters declined, more sea urchins will be available to feed on the kelp population, hence, will DECREASE.
Answer:The kelp population would decrease: sea otters eat urchins, and urchins eat kelp.
Because the otter population decreases the urchin population increases and therefore the demand for kelp increases and the kelp population will decrease as the population of urchins increases and it feeds on the kelp and due to the reduction in otters there is nothing controlling the urchin population
Explanation: Took the test got it correct
A tech is using the H (flagellar) antigen to serotype a suspected Salmonella species. The results of the serotyping are agglutination with one well that indicates a group of possible serotypes, not one particular serotype. Quality control passed. Why did this occur
Some Salmonella H antigens can occur in multiple strains and serotypes
An antigen (Ag) is any molecule/structure such as, for example, a molecule present on the surface of a pathogenic microorganism, that can be bound by a specific antibody and/or B-cell receptor. The Kauffmann–White classification scheme is a system that was adopted for use in 1934 in order to categorize different serotypes of the bacterial genus Salmonella, based on their somatic-surface antigens. The system is a practical (diagnostic) method based on the variation in the somatic (O) and flagellar (H) antigens present in the cell wall of Salmonella species. In this classification system, 'O' antigens are determined based on oligosaccharides which are associated with lipopolysaccharide, while the "H" antigens are distinguished by the protein content of the Salmonella flagella.Learn more about this topic here:
https://brainly.com/question/16306956?referrer=searchResults
https://brainly.com/question/19793069?referrer=searchResults
which gases does NOT contribute to greenhouse effect?
Answer:
Carbon monoxide is not a primary greenhouse gas. It contributes in a relatively small way directly to the greenhouse effect.A nonnative species of plant is introduced into a forest. Which of the
following would be most likely to prevent this plant from becoming an
invasive species?
O A. The plant is able to reproduce quickly in this ecosystem.
OB. The forest ecosystem lacks animals that eat the plant.
O C. The forest ecosystem has very low biodiversity.
O D. The plant must compete with tough native species.
Answer:
D- the plant must compete with tough native species
Explanation:
if the plant has to compete with tougher native species ots probably less likely to grow quickly and take over
To find the gene that encodes for the blue-light receptor, researchers inserted the gene for the PHOT1 protein into insect cells growing in culture. When they exposed the transgenic cells to blue light, they found that they PHOT1 protein became phosphorylated. No other plant proteins were present in the insect cells. Which of the following is a reasonable conclusion from this result?
A. The PHOT1 protein enabled the insect cells to photosynthesize.
B. The PHOT1 protein phosphorylated itself in the presence of blue light.
C. The PHOT1 protein is not responsive to blue light.
D. The PHOT1 protein is not functional in insect cells.
Answer:
я не знаю ответа извините
Explanation:
Why are fungi more like animals than plants?
PLEASE HELP ME
Answer:
Hey mate.....
Explanation:
This is ur answer.....
However, unlike plants, fungi do not contain the green pigment chlorophyll and therefore are incapable of photosynthesis. That is, they cannot generate their own food carbohydrates by using energy from light. This makes them more like animals in terms of their food habits.
Hope it helps!
Brainliest pls!
Follow me! ;)
Mary likes sour foods, and she decided to eat a slice of lemon. As she bit down on the lemon, she felt an uncomfortable squeezing-type sensation in her cheek as one of her salivary glands emptied its secretions into her mouth. Which of the three pairs of salivary glands did she feel
She felt the parotid.
I'm 99% sure this is right lol
A millimeter, a meter, and a kilometer are all measures of distance. What is
another way to classify them?
O A. U.S. customary units
B. Measures of mass
C. Measures of volume
D. Metric units
Answer:
I think the correct answer is D
help can be needed please
These are what I think.
1. B
2. A
3. C
4. D
Over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. Scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. However, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. These global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. In Switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. Chytridiomycosis is a fungal disease first identified in 1998 as a cause of massive amphibian deaths. In some severely impacted populations, a few individuals have survived, perhaps because of some natural resistance. If these resistant individuals continue to survive and prosper, new resistant populations might emerge. This would be an example of ________.
help is needed please!!
Answer:
| and ||
Explanation:
I haven't heard of heavy metal exposure causing nervous system damage, but I have heard that when you inhale during mining, you are inhaling all different particles and dust which causes other respiratory diseases, such as chronic obstructive pulmonary disease. Noise pollution is definitely true as people have lost their hearing from all the noise underground which also caused headaches. This is my opinion, sorry that I'm late!
sler Test
Select the correct location on the image.
Identify the position on the graph that gives the carrying capacity of the population.
population
y 1
2,000
1,500
Population Size
1,000
500
0
6
24
12 18
Time (months)
Reset
Next
First, there is a need to understand what the carrying capacity is as it relates to the environment:
Carrying capacity refers to the maximum number of individuals of a particular species that and environment can support based on the resources it has. The population of a species in an environment grows and oscillates around the carrying capacity of the environment.Now let us look at the graph. The population size grew from 0 and then leveled off at 2,000 with time. The leveling-off also happened without any oscillation, meaning that the maximum population size the environment can support is 2,000.
Hence, the portion on the graph that indicates the carrying capacity would be the plot where the population size is 2,000 and the time being between 12 and 18. This has been circled and labeled as 'K' in the attached image.
More about carrying capacity can be found here: https://brainly.com/question/20270121
Answer:
2,000
Explanation:
Right on Plato ;)
The DNA sequence ATC AGC GCT GGC CCG is part of a gene.
How many proteins are coded for by this message?
15
1
4
5
Answer:
There are 5 proteins coded for by this message.
Explanation:
For every 3 bases, a protein is coded.
Which of the following statements about active transport is true?
Molecules move down the concentration gradient.
ATP is not required to move molecules through the membrane.
ATP is formed as molecules pass through protein channels.
It results in a higher concentration of molecules on one side of the membrane.
Answer:
It results in a higher concentration of molecules on one side of the membrane.
Explanation:
Active transport is the transport of molecules up the concentration gradient. This means that molecules are going from low density to high density. This is the opposite of natural diffusion. So, it requires ATP to move the molecules this way. Diffusion normally occurs to maintain homeostasis and an equal amount of concentration on both sides of a membrane. But, with active transport, since molecules are moving up the gradient, the opposite happens and the concentrations are unequal.
Which of the following describe proteins? Check
all that apply.
O a large class of molecules made up of sugars
a type of molecule that can initiate or assist
other processes in the body
O a large class of molecules made up of amino
acids
O a molecule that stores the information for the
creation and functioning of cells
Answer:
a large class of molecules made of amino acids...since amino acids are the smallest particles that make up proteins.
I hope this helps
Answer: For the multiple choice the answers are B and C
Explanation: Just had this question in class
Where are protons located?
A. Outside the nucleus of an atom
B. Inside the nucleus of an atom
C. Inside the nucleus of agell
D. In the cell membrane
Answer:
B
Explanation:
both the protons and neutrons are located in the nucleus.
I hope this helps
How would the absence of gravity affect the formation of planets
Answer:
The rocks and debris would never accrete into a planet.
Explanation:
Gravity is an attraction force and dependents on the mass of the objects but in the absence of the force, the rocks and debris would not come together to form a clump. So, we can say that in the absence of gravity, the rock and debris would never accrete into a planet. So, we can say that in the absence of gravity, the rock and debris would never accrete into a planet.
Answer:
Gravity is an attraction force and dependents on the mass of the objects but in the absence of the force the rocks and debris would not come together to form a clump. So, we can say that in the absence of gravity, the rock and debris would never accrete into a planet.
Số lượng tế bào vi khuẩn E.Coli sau nuôi cấy thu được 32.104 tế bào. Thời gian để VK phân chia tăng số lượng tế bào, biết số lượng tế bào ban đầu cấy vào là 104, thời gian thế hệ của VK ở 400C là 20 phút.
The MLH1 protein dimerizes with the PMS2 protein to form a complex that is involved in the correction of errors of DNA replication. Loss-of-function mutations in the genes that encode for these proteins increase the incidence of colon cancer. Which type of DNA error would be repaired by the activity of this complex
Answer:
Mismatched bases
Explanation:
have a great day!
Which of the following can a UAV do?
1. Provide information about geography
2. Provide information about soil nutrients
3. Provide information about soil hydration
4. Provide information about plant health
Answer:
Provide information about geography
Explanation:
UAVs are otherwise known as unmanned aerial vehicles or drones. They are usually remotely controlled and monitored from a screen. They can be flown over a large expanse of land to obtain geographical information such as the topography of an area, the distance between two points, the height above sea level, and so on.
Except the UAVs are specially designed and equipped with extra features, they cannot be used to obtain information relating to soil nutrients, soil hydration, or information about plant health on a field.
Hence, the correct answer would be option 1,
Answer: Provide information about geography
Explanation:
It's correct
An eagle carries a fish up 50 m into the sky using 90 N of force. How much work did the eagle do on the fish?
(Work: W = Fd)
40 J
59 J
140 J
4500 J
Answer:
4500J
Explanation:
As the formula stated above:
work=force×distance
=90×50
=4500J
Biology report
Topic: Find out if there are diseases that are passed on from parents to the
offspring. Find out how these are carried and also if these diseases can be treated.
dominant genetic diseases
HUNTINGTON DISEASE
Explanation:
caused by a mutation in one copy of a gene. if a parent has a dominant genetic disease, then each of that person's children will have 50% chance of inheriting it.
NO TREATMENTS CAN ALTER THE COURSE OF HUNTINGTONS DISEASE.
BUT MEDICATIONS CAN LESSON SOME SYMPTOMS OF MOVEMENT AND PSYCHIATRIC DISORDERS.
P.S. IF YOUR TYPING THIS CHANGE THE WORDS
hope it helped
Which of the following statements is TRUE?
A.Introns are the parts of mRNA that are translated into protein.
B.Introns do not have any specific function,
C.Human genes have fewer introns than genes of other organisms.
D.Introns are not excised during post transcriptional modification
Answer:
A. introns are the parts of mRNA that are translated into protein.
Explanation:
i hope it helps you
The DNA stands for deoxyribose nucleic acid, it has all the information required for the proper functioning of the human body.
The correct answer is B
The process of the formation of protein from the mRNA is called translation. it requires:-
RibosometRNAmRNAThe mRNA has the introns and the exons in it. Exons are the coding part of the DNA while the introns are the non-coding part and it does not have any specific functions.
Hence, the correct option is B that is Introns do not have any specific function.
For more information, refer to the link:-
https://brainly.com/question/3523174
help needed asap please :(
Answer: its the top one
