Use the Information to Answer the Following Question

question 43

Multiple Choice

Use the information to answer the following question.
The Brazil nut tree, Bertholletia excels (n = 17) , is native to tropical rain forests of South America. It is a hardwood tree that can grow to over 50 metres tall, a source of high-quality timber, and a favourite nesting site for harpy eagles. As the rainy season ends, tough-walled fruits, each containing 8-25 seeds (Brazil nuts) , fall to the forest floor. Brazil nuts are composed primarily of endosperm. About $50 million worth of nuts are harvested each year. Scientists have discovered that the pale yellow flowers of Brazil nut trees cannot fertilise themselves and admit only female orchid bees as pollinators. The agouti (Dasyprocta spp.) , a cat-sized rodent, is the only animal with teeth strong enough to crack the hard wall of Brazil nut fruits. It typically eats some of the seeds, buries others, and leaves still others inside the fruit, which moisture can then enter and allow the remaining seeds to germinate.
Animals that consume Brazil nuts derive nutrition mostly from tissue whose nuclei have how many chromosomes?

• A) 17
• B) 34
• C) 51
• D) 68

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Definitions:

Great Arteries

Major arteries that carry blood away from the heart to various parts of the body, notably the aorta and the pulmonary arteries.

Atria

The heart's two top chambers that take in blood from the veins and move it to the ventricles.

Cardiac Tamponade

A critical condition where fluid accumulates in the sac surrounding the heart, restricting its ability to pump blood.

Preload

The degree of stretch of the cardiac muscle fibers at the end of diastole, prior to contraction; it affects the force of contraction and cardiac output.