13 Questions
What is the primary function of the endosperm in a seed?
To store nutrients and energy for the developing plant
Which type of seed has two cotyledons?
Dicot seed
What is the first step in the seed germination process?
Imbibition
What is the main function of the seed coat?
To protect the embryo from external damage
Which of the following is a characteristic of seed dormancy?
Seeds can remain dormant until conditions are favorable for growth
What are the main functions of roots in a plant?
Absorption of water and nutrients from the soil, anchorage of the plant in the soil, storage of food and nutrients, and production of certain hormones that promote growth and development
What is the main difference between a taproot and a fibrous root?
A taproot is a single, main root that grows straight down into the soil, whereas a fibrous root is a network of smaller roots that spread out in all directions
What is the purpose of root hairs in a plant?
To increase the surface area of the root, allowing for more efficient absorption of water and nutrients
What is the function of the epidermis in a root?
To protect the root from pathogens and water loss
What is the role of vascular tissue in a root?
To transport water and nutrients to the rest of the plant
What are adventitious roots, and where are they often found?
Adventitious roots are roots that grow from stems or leaves, often found in plants like ivy and cattails
What is the function of pneumatophores in certain plants?
To allow plants to breathe above the water line
What is the purpose of tubers in certain plants?
To store food and nutrients
Study Notes
Seeds
Structure
- Seed consists of three main parts:
- Embryo: miniature plant with root, stem, and leaves
- Endosperm: nutrient-rich tissue that provides food for the embryo
- Seed coat: protective outer layer
Functions
- Reproduction: seeds allow plants to reproduce and disperse
- Dormancy: seeds can remain dormant until conditions are favorable for growth
- Storage: seeds store nutrients and energy for the developing plant
Types of Seeds
- Monocot seeds: have one cotyledon (seed leaf), e.g. grasses, corn
- Dicot seeds: have two cotyledons, e.g. beans, peas
Seed Germination
- Conditions: seeds require water, oxygen, and suitable temperature to germinate
-
Steps:
- Imbibition: seed absorbs water
- Seed coat breaks: seed coat cracks open
- Radicle emerges: primary root grows out
- Cotyledon emerges: seed leaf grows out
Learn about the structure, functions, and types of seeds, as well as the process of seed germination. Understand the role of seeds in plant reproduction and growth.
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