Botany Glossary "M"

The mesophyll is the chlorenchyma cells (palisade layer and spongy layer) of the leaf. The mesophyll is bordered on the top and bottom side by the epidermis and has the leaf veins embedded in it between the palisade and spongy layer.

DIAGRAM: Vascular Cylinder / Root Anatomy

PHOTO: Leaf Cross Section

Mesozoic

Metabolic Products

Metabolic Energy

Metabolism

Metaphloem

DIAGRAM:

PHOTO: Root Cross Section

Metaxylem

DIAGRAM:

PHOTO: Root Cross Section / Root Cross Section / Root Cross Section

Meters per Hour

Methane

Methanogens

Microclimate

Microfibrils

(as in cell wall)

Microorganisms

Micronutrients

Microphyll

DIAGRAM: Equisetum Stem

PHOTO:

Micropylar End

Micropyle

Microsporangia

DIAGRAM:

PHOTO: Selaginella Strobilus Longitudinal Section
Selaginella Strobilus Longitudinal Section
Selaginella Strobilus Longitudinal Section

Microsporangiate Strobili

Microspore Mother Cells

Microspores

DIAGRAM:

PHOTO: Selaginella Strobilus Longitudinal Section

Microsporocyte

Microsporophyll

DIAGRAM:

PHOTO: Selaginella Strobilus Longitudinal Section
Selaginella Strobilus Longitudinal Section

Microtubules

DIAGRAM: Microtubules

PHOTO:

Mid-atlantic Ridge

Middle Lamella

The middle lamella is the material between adjacent cells of a plant. It is essentially the "glue" that holds plant cells together.

DIAGRAM: Pits

PHOTO:

Middle Story

Midrib

Midwest

Migration

Mildews

Milkweed

Millimeters per Hour

Mimosa pudica

Mints

Minute

Mitochondria

DIAGRAM: Mitochondria / Microtubules

PHOTO:

Mitosis

Mitochondria

Mitochondria are the furnaces of the cells. They are enclosed by a membrane with a folded membrane within. This is where cellular respiration occurs to provide energy to the cell in the form of ATP.

Mobility

Modified Leaves

Modified leaves are structures that have their origin from a leaf bud. Modified leaves typically do not look like leaves. Good examples of modified leaves are tendrils, bud scales, onion scales, etc.

Modified Stems

Modified stems are plant organs that contain nodes and internodes just like stems except they don't look like stems. A number of modified stems exist: rhizomes, tubers, thorns, bulbs, corms, stolon, cladophylls, etc.

DIAGRAM: Thorns

PHOTO:

Moisture

Molds

Molybdenum

Monarch Root

Monera

Monkey Flowers

Monocots

Monocots are plants that are characterized by a single cotyledon (seed leaf) in the seed, parallel-veined leaves, vascular bundles scattered, flower parts in threes or multiples of threes, and no secondary growth.

DIAGRAM: Monocot Leaf \ Grass Leaf Structure

Monocot Stem Intercalary Meristem

Monocot Vascular Bundle
Monocot Vascular Bundle

PHOTO: Monocot Stem Cross Section Vascular Bundle
Monocot Stem Cross Section
Monocot Stem Cross Section
Monocot Stem Cross Section Vascular Bundle

Monocot Root Cross Section
Monocot Root Cross Section
Monocot Root Cross Section
Monocot Root Cross Section

Narcissus / Narcissus / Narcissus / Narcissus / Narcissus
Narcissus / Narcissus / Narcissus / Narcissus

Monocot Ovary Cross Section
Monocot Ovary Cross Section

Monocotyledonae

Monocultures

Monoecious Flower

Monopodial

Monopodial branching is where there is a main trunk with whorls of branches at each node. Pine and firs trees are good examples of this type of branching.

Monosaccharide

Moose

Mormon Tea

Morphology

The morphology of a biological entity is its outside structure and form. It is what shows on the outside of a plant or animal body. Morphology in animals refers to arms, legs, head, neck, nose, etc. Morphology in plants refers to the form of the buds, lenticels, length of the internodes, etc.

Mosquito Larvae

Mosquito Fish

Mosses

DIAGRAM:

PHOTO: Mosses / Mosses / Mosses / Mosses / Mosses / Mosses

Moss Leaf Cross Section
Moss Leaf Cross Section

Moss Stem Cross Section
Moss Stem Cross Section

Moss Capsule Cross Section
Moss Capsule Cross Section
Moss Capsule Cross Section
Moss Capsule Cross Section
Moss Capsule Cross Section

Moth Mullen

mRNA

DIAGRAM: Ribosomes

PHOTO:

Mucilaginous

Mulberry

Multicellular

Organisms that are multicellular are composed of many cells, with each cell within a tissue having a special physiological function, each tissue within an organ having a special physiological function, and each organ within the organism with its own special function. Thus, multicellular organisms show division of labor.