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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 meters tall, a source of high-quality lumber, and a favorite 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 fertilize 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.
Predict the most likely outcome to the population of Brazil nut trees if a disease decimated the agouti population. (A) The population of large Brazil nut trees would remain constant for a while, but the population of new seedlings would likely increase in the long run. (B) The population of large Brazil nut trees would decline immediately, and the population of new seedlings would likely decrease in the future. (C) The population of large Brazil nut trees would remain constant for a while, but the population of new seedlings would likely decrease in the long run. (D) Both the population of large Brazil nut trees and new seedlings would increase in the long run.



Answer :

Orchid bees are all to Brazil nut trees what breezes are to pine trees. In order to help pollinate Brazil nut trees, the female orchid bees act as pollinators. The fertilization of pine trees is aided by wind or breeze.

Pinetrees can they self-pollinate?

Gymnosperms like pine trees lack the blooms that attract pollinators like bees, butterflies, and birds. They are pollinated by wind. Because pine trees are monoecious, both the male and female reproductive organs (pinecones) are present on the same tree.

The pollen grains from male catkins (cones) are lighter, less sticky, and endowed with small wings or air bladders. These qualities make it simple for the pollen grains to be dispersed by the wind. In order to prevent self-pollination, which happens when pollen contacts the female cones of the same tree, the male cones are normally found on the lower branches of the pine tree.

Are pine trees pollinated?

Pine trees don't create flowers with pollen hidden inside the ovaries; they instead generate cones with exposed seeds or pollen.

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