BIOLOGY HIGH SCHOOL

How many chambers does the heart contain?
A. 3
B. 4
C. 5
D. 6

Answers

Answer 1
Answer: The heart contains four chambers: upper left atria, upper right atria, lower left ventricle and the lower right ventricle. Oftentimes, the right atria and right ventricle are together referred to as the "right heart" and the left atria and left ventricle are referred to as the "left heart", however there are still four separate chambers.
Answer 2
Answer:

Final answer:

The human heart has four chambers, which consist of two atria and two ventricles, working together to pump blood to the lungs and the rest of the body.

Explanation:

The human heart contains four chambers: two atria and two ventricles. The atria, located on the top, are the chambers that receive blood. The ventricles, located on the bottom, are the chambers that pump blood out of the heart. This structure allows the heart to pump blood to both the lungs and the rest of the body in a very efficient way.

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Which statement best describes an independent variable? A-The variable that responds to change in a investigation B- The variable you can change in an investigation C- The effect in a cause/effect relationship D- The factor that can never change in an investigation

Answers

The statement that best describes an independent variable is B. the variable you can change in an investigation. There can be only one independent variable during an experiment, because if you change more things, you won't know which variable it is that brought about the change. So, there is one variable that you change that doesn't depend on anything else and that you can alter in order to get the results you want.

What may happen to a species whose limited habitat is destroyed by land development

Answers

Answer:

extinct

Explanation:

  • The practice of land development like the urbanization and industrialization which leads to rapid and heavy use of the natural resources of the lands and thereby creates pressure on the biological diversity of the lands and thus making it difficult or the survival of the species.
  • The land development practices of the agriculture that leads to the introduction of new species of flora and fauna create a competition of the native species and thus decrease there chances of survival and loss of habitat hence create extinction of the species.

it will become extinct

Indicate which pattern of evolution is shown by the many species of finches on the Galápagos Islands.

Answers

Answer;
Adaptive radiation;
The pattern of evolution that is shown by many species of finches on the Galapagos Islands is Adaptive radiation. 

Explanation; 
Adaptive radiation is a pattern of evolution in which a single lineage undergoes multiple speciation events to fill divergent ecological niches. The result is a cluster of phenotypically distinct related species.
A few million years ago, one species of finch migrated to the rocky Galapagos from mainland of Central or south America. From this one migrant species would come many species;-at least 13 species of finch, which exploit different niches, evolving from a single ancestor. 

Answer:

Adaptive Radiation

Explanation:

Adaptive radiation refers to the process of diversification of ancestral line into different forms that occupy diverse ecological niche. The ancestral seed eating stock of Darwin’s finches diversified according to different types of food (plants, seeds, insects, cactus etc) available. They developed type of beak adapted to that food. The geographical isolation led reproductive isolation. Hence, many species of finches on the Galápagos Islands exhibit "adaptive radiation".

What is the special feature of the leaves of C4 plants?

Answers

The special feature is that it contains mesophyll and budndle sheath cells which is photosyenthesis is separated in each of them.
the special feature of the leaves of the c4 plants are:they contain chloroplasts both in the mesophyll and a budle sheath cellIn c4 Plants, the CO2 used in photosynthesis is combined with another compound so the y are able to be exposed to oxygen without RuBisCo

A successful biologist’s main interest area would be _____.a. the 21
b. scientific
c. 4
d. social

Answers

A successful biologist's main interest are would be scientific

scientific !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

On what basis did al-Qaeda most likely choose its first American bombing targets?The targets were at sea, so no one else around would be hurt.
The targets were in Africa, which is not far from the Middle East.

Answers

Al-Qaeda chose its first American bombing targets if the targets were in Africa, which is not far from the Middle East. The second one is your answer. I hope this is the answer that you are looking for and it comes to your help.

The targets were in Africa, which is not far from the Middle East is the correct answer.

The Al-Qaida-the Islamic Militant organisation who were responsible for 9/11 attack, likely choose its first American bombing targets in Africa, which is not far from middle east, the latter being the cradle of al-Qaida.
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