Only a Small Proportion of the World's Species Are Found

question 62

Multiple Choice

Only a small proportion of the world's species are found on each individual continent. Which organism is an exception and has a widespread distribution across most continents?

• A) Monarch butterfly
• B) Barnacle (Semibalanus balanoides)
• C) Norway rat
• D) Heathlands

Recognize the structure and function of DNA and the process of mitosis in genetic continuity.

Differentiate between monozygotic and dizygotic twins and understand the factors influencing twin pregnancies.

Comprehend the significance of genetic research and its pioneers, such as Gregor Mendel, in understanding heredity.

Identify genetic disorders and understand the genetic basis of diseases like cystic fibrosis.

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Definitions:

Chordae Tendineae

Heart strings that connect the papillary muscles of the heart to the tricuspid and mitral valves, facilitating valve function.

Tricuspid Valve

A valve in the heart that lies between the right atrium and the right ventricle, preventing backflow of blood.

Aortic Valve

A valve in the heart between the left ventricle and the aorta that prevents blood from flowing back into the ventricle after it has been pumped out.

Coronary Sinus

A large vein on the posterior side of the heart that collects blood from the heart muscle (myocardium) and returns it to the right atrium.