A scientist tries to mate the two similar-looking fruit flies Drosophila melanogaster and Drosophila simulans. He finds that they are unable to produce viable offspring. What kind of evolutionary barrier could this be? A. Chromosomal
B. Postzygotic
C. Physical

Answers

Answer 1

Answer: A Drosphila melanogaster and a Drosphila simulans are unable to produce viable offspring because of (B) Postzygotic evolutionary barrier. This is because the hybrid of the two cannot regularly form their genes together. When this does happen, the offspring generally does not live because the baby cannot mature enough and it usually dies before being born.

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Volcanoes impact both the air and land of the surrounding environment. true or false
what is one reason that the offspring resulting from breeding the sheep with an unrelated sheep would not all be the same
In this excerpt from the poem "Learning to Read" by Frances Ellen Watkins Harper, what is the meaning of the word rising?And said there is no use trying, Oh! Chloe, you're too late; But as I was rising sixty, I had no time to wait. A. advancing B. approaching C. increasing D. elevating E. succeeding
When two loci are on the same chromosome, progeny sometimes do not exhibit the phenotypes that would be predicted by the law of independent assortment. this outcome can be explained by the phenomenon of?
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Salvinia molesta, a floating aquatic plant, first entered Lake Naivasha in Kenya when a person's fish ponds flooded. The plant quickly grew, changing the habitat of parts of the lake. This is an example of a problem due to _____.a.
reintroduction programs
c.
habitat fragmentation
b.
exotic species
d.
edge effect

Answers

The answer is b. exotic species.

Exotic species are species that are not native to specific ecosystem, but they have the capability to spread widely through the ecosystem, This way they can threaten native species of the ecosystem or cause environmental harm

How did the changes in the composition of the Earth's atmosphere affect the evolution of life?

Answers

in the early atmosphere, the earth had no trees, and the gases were mainly, carbon dioxide, methane and nitrogen. no oxygen.

when plants began appearing, it increased oxygen in atmosphere, and decreased carbon dioxide, which was also dissolved into oceans forming within sedimentary rocks.

this increase in oxygen continued, and helped create human life.

Answer:

rising temperatures, droughts, shifting patterns of precipitation and longer growing seasons, plants and animals are evolving to keep pace. Biologists have observed squirrels and salmon developing at an accelerated pace, causing them to reproduce at a younger age.

when you boil water on the stove and steam will rise from the pan which is this is a true statement right as the water begins to boil

Answers

A condensation is a process where liquid changes into a gaseous form also known as water vapour. It occurs in the atmosphere when the temperature rises.
Water is produce when glucose and fructose undergo a condensation process. The water is removed by the combination of hydrogen and a hydroxyl together. Glucose and Fructose forms a substance called glycosidic linkage. And hydrogen and hydroxyl is separated from glucose and fructose. When Hydrogen and hydroxyl is combined, they create H2o or water.

Hill is known for working out reactions taking place during the _____ of photosynthesis

Answers

Answer: The correct answer for the fill in the blank is Light dependent phase of photosynthesis.

Photosynthesis ( synthesis of food in presence of sunlight) is primarily divided into Light dependent and light independent phase.

Light dependent phase occurs in the thylakoid membrane within chloroplast and the chemical reactions taking place in this phase are also called Hill reaction. Energy from sunlight is absorbed and converted into chemical energy in the form of ATP and NADPH and Oxygen is produced due to splitting of water in this phase.

Hill is known for working out reactions takin gplace during the light reaction of photosynthesis. The process was described by Robin Hill, a biochemist, who discovered that the process of creating oxygen was not the same one that turns carbon dioxide into sugars in plants during photosynthesis. His theories became the foundation for the understanding of photosynthesis.

Which is not part of the conducting portion of the respiratory system?

Answers

The part that is not the conducting portion of the respiratory system is the alveoli, which is in option D, as this is not a part of the conducting portion but a part of the respiratory system. So, option d is correct.

The alveoli are small, thin-walled sacs located at the end of the bronchioles in the lungs. They are responsible for gas exchange, where oxygen is taken up from the inhaled air and carbon dioxide is released into the exhaled air. While the alveoli are an essential part of the respiratory system, they are not considered part of the conducting portion. Instead, they are part of the respiratory portion, where gas exchange occurs. So, option d is correct.

Learn more about the respiratory system here.

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complete question is below

which is not part of the conducting portion of the respiratory system?

A.heart

B.eye

C.skin

D.alveoli

Answer:Which is not part of the conducting portion of the respiratory system? The epithelial lining of the oropharynx and the superior larynx (vocal cords) is nonkeratinized stratified squamous. In general, respiratory zone structures are lined with a thicker mucosa than conducting zone structures.

Explanation:

brainliest pls

What is produced during transcription?A. RNA molecules

B. DNA molecules

C. RNA polymerase

D. proteins