BIOLOGY HIGH SCHOOL

Which organisms utilize a one-way air flow through their lungs to maximize airflow efficiency and oxygen consumption?

Answers

Answer 1
Answer: The answer is birds.

Birds utilize a one-way airflow through their lungs to maximize airflow efficiency and oxygen consumption. Although they inhale and exhale through one trachea, air flows in one direction through birds lungs. This is enabled thanks to air sacks. When birds inhale, air travels through the trachea, which further divides into two bronchi. The part of the air enters the lungs, and the other part remains in posterior air sacks. After the first exhalation, the fresh air from the posterior air sacks enters the lung and displace the spent air which is moved to the trachea. In case there is fresh air in the trachea, spent air is moved to anterior air sacks and after following exhale, it flows out from the trachea.

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Why is it necessary that the cell copies its DNA?

Answers

It is important for reproduction. Replication of a DNA is a very basic process that should happen within a cell. Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, as the parent cell. Hope this answers the question.

What is a group of terrestrial communities that covers a large area and is characterized by certain soil

Answers

This is a biome.

Biomes really do cover large areas, for example there is one biome stretching from France to central Russia (temperate broadleaf forrest). They are characterized by a similar soil and a shared community of animals and plants.

What is released when limestone is exposed?

Answers

Carbon dioxide is released

What is included in molecular evidence in support of the principle of common descent?A. The nearly universal genetic code
B. The presence of vestigial structures
C. The diversity of biogeography
D. The evolution of analogous functions

Answers

"The nearly universal genetic code" is the one among the following choices given in the question that is included in molecular evidence in support of the principle of common descent. The correct option among all the options that are given in the question is the first option or option "A". I hope it helps you.

The correct answer to your question is

A. The nearly universal genetic code.

Convergent evolution suggests different organisms evolved _____ due to _____. similarly; different environments differently; different environments differently; similar environments similarly; similar environments

Answers

The answer is similarly; similar environments.


Convergent evolution suggests different organisms evolved similarly due to similar environments. 


Convergent evolution is a phenomenon of independent evolution of similar traits in species that are in different lineages. These traits are similar in form or function but were not present in the last common ancestor of those species.

There are many examples of convergent evolution among plants and animals.
Among the plants, both cactus and euphorbia are succulent plants, have spines, live in the deserts, but they belong to the different families.
Among the animals, dolphin, which is a mammal, is more similar to fish, than to other mammals. Or, both birds and bat, which is the mammal, have wings.

So, all these examples of convergent evolution suggest that the living in the similar environmental conditions led to development of similar forms between distinct species.

The answer is similarly; similar environments.

Which of the following scientist contributed to the current of understanding genetics

Answers

Answer:

Explanation:

Several scientists have made significant contributions to our current understanding of genetics. Here are a few examples:

1. Gregor Mendel: Mendel is often referred to as the "father of genetics." In the 19th century, he conducted groundbreaking experiments with pea plants and discovered fundamental principles of inheritance. His work laid the foundation for our understanding of how traits are passed down from one generation to another.

2. James Watson and Francis Crick: In the 20th century, Watson and Crick, along with Maurice Wilkins, elucidated the structure of DNA. Their discovery of the double helix structure in 1953 revolutionized our understanding of how genetic information is stored and transmitted. This laid the groundwork for modern molecular genetics.

3. Rosalind Franklin: Although often overshadowed, Franklin played a critical role in the discovery of DNA's structure. Her X-ray crystallography images provided crucial evidence that helped Watson and Crick develop their model. Franklin's work contributed to our understanding of DNA's physical properties and its role in inheritance.

4. Barbara McClintock: McClintock's research on corn plants in the mid-20th century revealed the existence of "jumping genes" or transposable elements. Her findings challenged the traditional view of genes as fixed entities and highlighted the dynamic nature of genetic material. McClintock's work earned her the Nobel Prize in Physiology or Medicine in 1983.

These scientists, along with many others, have made significant contributions to our understanding of genetics. Their discoveries have paved the way for further advancements in the field, leading to breakthroughs in areas such as genetic engineering, gene therapy, and personalized medicine.
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