Botany - Ch.1 Flashcards
The study of plants?
Botany
The three broad divisions of Biology?
Botany
Zoology
Human anatomy and physiology
The importance of plants?
Man is totally dependent on plants, directly or indirectly, for food; plants and plant products are also essential in medicine and industry.
How are land plants grouped according to the size and shape of the stem?
Plants are commonly classified as trees, shrubs, herbs or vines. (They may also be classified as woody or herbaceous.)
The two main kinds of root systems?
Taproot system, and fibrous root system.
What is the difference between annuals, biennials, and perennials?
Annuals: short lived plants that complete their entire life cycle in one growing season.
Biennials: complete their life cycle in two growing seasons.
Perennials: live from year to year and bloom each season.
The three most important cereal crops?
Wheat, rice, and corn.
The purpose of flowers?
Help plants reproduce after their kind by forming reproductive cells; produce fruits and seeds.
The purpose of leaves?
Manufacture food for the plants by means of photosynthesis.
The purpose of stems?
Hold up the plants leaves and flowers.
The purpose of roots?
Anchors the plant to the soil, absorbs water and minerals, and stores food.
Why are plants do important to life on the earth?
All animal life depends upon plants for food, either directly or indirectly; man’s food comes from plants and from animals that eat plants.
Why is the nitrogen cycle important?
Both plants and animals require nitrogen for survival; plants use nitrogen to form proteins, and animals and man need the proteins that come from plants.
What are the four differences between monocots and dicots?
Monocots: 1 cotyledon per seed
Parallel veins
Petals in multiples of 3
Fibrous root system
Dicots: 2 cotyledons per seed
Branching veins
Petals in multiples of 4 or 5
Taproot system
In what ways are grasses important to man?
Grasses provide much of the world’s food for both animals and man. (Grasses also prevent soil erosion.)
What is the difference between deciduous trees and evergreen trees?
Deciduous trees lose their leaves and remain bare in the winter. Evergreen trees retain their leaves throughout the year.
The study of living things?
Biology
