soils
What is the uppermost layer of the Earth's surface, composed of organic and mineral particles, capable of supporting plant life?
Soil
What is the primary function of a seed?
To protect and nourish the embryo, facilitating its dispersal and germination.
What is the definition of germination?
The process by which a seed begins to sprout and grow into a seedling.
What is plant propagation?
The process of creating new plants from existing plant material.
What is the water cycle?
The continuous movement of water on, above, and below the surface of the Earth.
Which soil horizon is known as the topsoil, rich in organic matter and essential for plant growth?
A horizon
What are the three main parts of a seed?
Embryo, endosperm, and seed coat.
What are the three main environmental factors that affect germination?
Water, oxygen, and temperature.
What are the two main types of plant propagation?
Sexual propagation (using seeds) and asexual propagation (using vegetative parts).
What are the four main processes of the water cycle?
Evaporation, condensation, precipitation, and collection.
What are the three primary particles that make up the mineral component of soil?
Sand, silt, and clay
What is the process called when a seed begins to sprout and grow?
Germination.
What is imbibition in the context of seed germination?
The absorption of water by the seed, which is the first step in germination.
Name three methods of asexual propagation.
Cuttings, layering, and grafting.
What is evaporation?
The process by which water changes from a liquid to a gas or vapor.
Which property of soil refers to the relative proportions of sand, silt, and clay particles?
Soil texture
Which part of the seed provides the developing seedling with nutrients?
Endosperm.
What is the role of enzymes during seed germination?
To break down stored food reserves in the endosperm or cotyledons, providing energy for the growing seedling.
What is a cutting in plant propagation?
A piece of a plant (stem, leaf, or root) that is used to grow a new plant.
What is condensation?
The process by which water vapor in the air changes into liquid water.
What is the process by which water-soluble salts accumulate in the soil, often due to high evaporation rates in arid regions?
Salinization
What environmental factors are typically required for seed germination?
Water, oxygen, and suitable temperature.
What is the difference between epigeal and hypogeal germination?
Epigeal germination is when the cotyledons emerge above the soil surface, while hypogeal germination is when the cotyledons remain below the soil surface.
What is grafting?
The process of joining two plants together so that they grow as one.
What is precipitation?
Any form of water that falls from clouds, such as rain, snow, sleet, or hail.