Read the text below and answer the question.
TEXT I
The Amazon is often referred to as "the world's largest medicine
cabinet" CREDIT: Getty
(https://www.telegraph.co.uk/travel/cruises/articles/how-to-be-a-botanical-buff/)
Medicinal Treasures of the Rainforest
The widespread destruction of tropical rainforest ecosystems
and the consequent extinction of numerous plant and animal
species is happening before we know even the most basic facts
about what we are losing.
Covering only 6 percent of the Earth's surface, tropical moist
forests contain at least half of all species. The abundant botanical
resources of tropical forests have already provided tangible
medical advances; yet only 1 percent of the known plant and
animal species have been thoroughly examined for their
medicinal potentials. Meanwhile, 2 percent of the world's
rainforests are irreparably damaged each year.
Approximately 7,000 medical compounds prescribed by
Western doctors are derived from plants. These drugs had an
estimated retail value of US$43 billion in 1985. Seventy percent
of the 3000 plants identified by the United States National Cancer
Institute as having potential anti-cancer properties are endemic
to the rainforest. Tropical forest species serve Western surgery
and internal medicine in three ways. First, extracts from
organisms can be used directly as drugs. For maladies ranging
from nagging headaches to lethal contagions such as malaria,
rainforest medicines have provided modern society with a variety
of cures and pain relievers.
[…]
Secondly, chemical structures of forest organisms sometimes
serve as templates from which scientists and researchers can
chemically synthesize drug compounds.[…]
Finally, rainforest plants provide aids for research. Certain
plant compounds enable scientists to understand how cancer
cells grow, while others serve as testing agents for potentially
harmful food and drug products. Tropical forests offer hope for
safer contraceptives for both women and men. The exponential
growth of world population clearly demonstrates the need for
more reliable and effective birth control methods. Worldwide,
approximately 4,000 plant species have been shown to offer
contraceptive possibilities. The rainforest also holds secrets for
safer pesticides for farmers. Two species of potatoes have leaves
that produce a sticky substance that traps and kills predatory
insects. This natural self-defense mechanism could potentially
reduce the need for using pesticides on potatoes. Who knows
what other tricks the rainforest might have up its leaves?
Adapted from https://www.adventure-life.com/amazon/articles/medicinaltreasures-of-the-rainforest
Based on the information provided by Text I, mark the
statements below as true (T) or false (F).
( ) The medicinal potentials of all Amazonian plants are well
known.
( ) The structure of plants can be used as patterns for producing
drugs.
( ) Amazonian plants have been proven to be useless as
contraceptives.
The statements are, respectively,
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