Chapter 23.3, Problem 3MI

Summary Introduction

To determine:

The definition of given terms.

Introduction:

A cell is the structural, functional, and biological unit of all living organisms. It is smallest unit for life. A cell can be prokaryotic or eukaryotic. Eukaryotic cells contain membrane bound cell organelles, that help in functioning of cellular machinery by carrying out biochemical reactions.

Explanation of Solution

Polar nuclei − The polar nuclei are found at the center of female gametophyte, which is surrounded by thin layer of cytoplasm.

Endosperm − It is a tissue that is formed inside the seeds of certain flowering plants after the fertilization process. It surrounds the embryo and provide it with nutrition.

Seed coat − It is a part of plant seed that helps in protecting the seed from water damage, physical damage, and temperature related damage.

Germination - It is the process by which a plant grows from the seed.

Radicle − It is the part of seedling that first comes out from the seed during germination process. Radicle is basically embryonic root and grown downwards into the soil.

Hypocotyl − It is the stem of germinating seedling and is found below cotyledons and above the radicle.

Dormancy − It is the time in the life cycle of an organism when its growth, physical activity, and development gets temporarily stopped. This helps the organism to conserve energy.