PLS170C1 Exam 3 Questions with Correct Answers
What is caffeine found in? - Answer-coffee seeds, tea leaves, and kola seeds
The primary reason for plant production of secondary metabolites is to provide___________________. - Answer-defend themselves against herbivores
Caffeine is a mild s...
PLS170C1 Exam 3 Questions with
Correct Answers
What is caffeine found in? - Answer-coffee seeds, tea leaves, and kola seeds
The primary reason for plant production of secondary metabolites is to
provide___________________. - Answer-defend themselves against herbivores
Caffeine is a mild stimulate in humans that _______________________. - Answer-
speeds up the heartbeat, promotes alertness and endurance, increases blood pressure
The coffee plant is native to ____________________, but coffee was probably first
brewed in __________________. - Answer-Ethiopia; Yemen
The color and aroma of coffee beans depends on __________________ conditions. -
Answer-roasting
T or F: Essential oils and tannins in Camelia sinensis leaves and additives (e.g. jasmine
blossom) determine the flavor of the tea. - Answer-True
The common name for the roasted and crushed cotyledons of Theobroma cacao is
_________________. - Answer-Chocolate
The cacao tree was first cultivated by native peoples was NOT from
___________________. - Answer-Africa, N. America, or Asia
T or F: Cola drinks are made with seeds from the kola tree (Cola nitida) found in West
Africa. - Answer-True
T or F: Because Coca-Cola contains an extract of coca leaves it has significant levels of
cocaine. - Answer-False
Plants release odors and aromas in the form of volatile oils to ______________. -
Answer-attract pollinators
Chemicals in plants that effect the human central nervous system are called
___________________. - Answer-alkaloids
T or F: All psychoactive drugs are illegal and have no medical use - Answer-False
, T or F: Many prescription drugs contain active ingredients that are of plant origin -
Answer-True
Aspirin was first discovered by native peoples and used as a tea made from
_____________. - Answer-Willow Trees
Ethnobotanists ___________________. - Answer-study uses of plants by humans, are
knowledgeable in plant taxonomy, and look for new medicinal uses for plant chemicals
T or F: Scientists are concerned because the sources of taxol are diminishing and there
are no other sources for this important anti-cancer drug. - Answer-False
The following plants produce chemicals poisonous to man and other animals
__________________. - Answer-Asian-Indian tree, castor bean, oleander
For the most part, plants producing pollen that causes allergic reactions in humans are
______________ pollinated. - Answer-Wind
About half of the population will develop a rash when exposed to this substance from
poison ivy, oak, or sumac leaves. - Answer-urushiol
All of the following are important contributions of plants to humans except
_____________________. - Answer-carbon dioxide, oxygen, food, medicines
Answer: Carbon Dioxide
T or F: Spices and herbs usually come from the same parts of plants. - Answer-False
Cinnamon is a product of the tree _________________. - Answer-Bark
T or F: Pepper, from the berries of Piper nigrum, produces the chemical capsaicin. -
Answer-False
Cloves are used for ________________________. - Answer-disinfectant, mouthwash,
and medicines
T or F: Scientists agree that the practice of agriculture arose in the British Isles and
spread to the rest of the world as man migrated from one region to another. - Answer-
False
Archaeological studies indicate that rice cultivation occurred in China approximately
_______ years ago. - Answer-11,500
T or F: The transition to agriculture is credited as the beginning of civilization as the
more stationary life style allowed for the development of diverse worker skills and
eventually, culture. - Answer-True
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