biology chapter 1 - Amazon S3 · bios = life logy = study of. Biology is the study of living things...
Transcript of biology chapter 1 - Amazon S3 · bios = life logy = study of. Biology is the study of living things...
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Biology Chapter 1
bios = life logy = study of
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Biology is the study of living
thingsthis is broken
down into 3 major groups:
1. botany 2. zoology
3. human anatomy and physiology
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Botany - the study of plants • 2/3 of the food we eat comes from plants, the other 1/3 comes from animals that eat plants
• many drugs and antibiotics used in medicine are derived from plants
• industry, products as lumber, paper and clothing are derived from plants
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Why are flowers important to plants?
Flowers help the plants reproduce more of their kind
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Herb meaningsScientific definition- in botany, an herb is any
plant whose stem remains relatively soft
Everyday definition - an herb is a plant used as a medicine, seasoning or flavoring
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How are taproot systems different from fibrous root systems?
Taproot - one main root typically grows straight
down and remains larger than the secondary roots
that branch from it.
Fibrous root system - many slender secondary
roots grow in all directions in a tangled mass
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What 2 types of flowers make up a composite flower?
Disk flowers and Ray Flowers
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What major structural characteristic do all members of the pea family have in common?
pod-like fruits
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4 Differences between dicots and monocots?Monocots
* 1 cotyledon * parallel veins * petals in multiples of 3 * fibrous roots
Dicots * 2 cotyledons * branching veins * petals in multiples of 4-5 * taproots
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What are the 3 most important cereal crops?
Wheat
Corn
Rice
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Would a pine tree be classified as
an annual, a biennial, or a perennial?
perennial - plants that live from year to year
annuals - live for one single growing season biennials - their first year of growth, they devote to storing
food in their enlarged tap roots reserving flowers and seeds and are usually harvested at this point to gain
stored food
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Are grasses monocots or dicots? How can you tell?
monocots - the leaves are long and narrow with parallel
venation and the root system is fibrous
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Nitrogen cycle and the role of pea family- nitrogen cycle is the movement of nitrogen from the air, into the
soil, and back into the air. Plants need nitrogen in order to survive. Legumes, a member of the pea
family, have nitrogen-fixing bacteria growing on the roots that convert the nitrogen not absorbable nitrates.
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What is the difference between a deciduous tree and an evergreen tree?
Deciduous trees lose their leaves and remain bare in
the winter
Evergreen trees retain their leaves throughout winter
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What group of trees is known for thin, smooth bark
that peels off?
Birch
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Which trees grow in damp
areas?
Willows
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Two types of trees, in addition to willows, that
are members of the willow family?
Poplar
Quaking Aspen
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MicroscopesRead contract now
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• Always begin your observation on the lowest power (4X)
• Always move the slide around to find the best area for viewing. This process is called scanning.
• Always handle slides and cover slips by the ages.
• Always use forceps to handle the specimen when preparing wet mounts.
• Always focus the microscope by moving the stage away from the objective.