Classification and Nature of Agricultural Crops

Comprehensive practice flashcards covering plant taxonomy, cellular structure, internal tissue systems, plant organs, and monocot vs. dicot distinctions.

Who is the Swedish botanist shown in this portrait, known as the Father of Taxonomy for establishing the binomial system of plant nomenclature?

Carolus Linnaeus

What is the correct hierarchical order of the principal ranks of plant categories (taxa) in botanical classification?

Kingdom, Division, Class, Order, Family, Genus, Species

What modern standardized family name ending in -aceae replaces the traditional family name Gramineae?

Poaceae

In plant taxonomy, how is a line cultivar defined?

A group of self-fertilizing plants that maintain their genetic identity naturally through generations.

What is the botanical scientific name for sweet potato or camote?

Ipomoea batatas

What term refers to a crop planted after the flowering period or harvest of the main crop in a specific cropping system?

Relay crop

What ecological adaptation classification describes plants that grow aboveground on another plant for physical support without taking nutrients parasitically?

Epiphyte

Which component layer of the plant cell wall is composed of pectin and holds adjacent cells together?

Middle lamella

Which specialized microbodies in plant cells contain enzymes necessary for converting fats into carbohydrates during germination?

Glyoxysomes

What organelle, shown here in section and surface views, consists of flat membranous sacs with budding vesicles and acts as the cell's packaging center?

Golgi body (or dictyosome)

Within a chloroplast, what name is given to the stacks of disklike thylakoids?

Grana (singular: granum)

What is the term for the cytoplasmic matrix or liquid 'cellular soup' in which the nucleus and organelles are suspended?

Cytosol

How does the anatomical origin of structures from the pericycle differ between a dicot root and a monocot root?

In a dicot root, the pericycle gives rise to lateral roots, phellogen, and part of the vascular cambium, whereas in a monocot root, it gives rise to lateral roots only.

Which simple permanent tissue is composed of cells with thick secondary cell walls and provides mechanical support to plant structures?

Sclerenchyma tissue

Which complex permanent tissue functions in the conduction of water and dissolved minerals throughout the plant?

Xylem

In the dermal tissue system, what corky tissue replaces the epidermis in secondary or woody plant parts?

Periderm (or bark)

What thimble-like, multicellular structure covers and protects the delicate apex of the root as it grows through the soil?

Root cap

In which region of the root tip do epidermal cells differentiate to form fine, thread-like root hairs for absorption?

Region of Maturation

Which tissue layer in the leaf mesophyll serves as the primary site of photosynthesis?

Palisade mesophyll

By what structural feature can modified stems (such as potato tubers) be distinguished from modified roots?

By the presence of nodes and internodes (with scale leaves appearing as eyes or scars).

What is the term for an imperfect female flower that contains sepals, petals, and a pistil, but lacks stamens?

Pistillate flower

What flowering condition describes a species in which male (staminate) and female (pistillate) flowers are borne on separate individual plants, such as in papaya?

Dioecious

What are the three distinct layers of the pericarp (fruit wall) from outermost to innermost?

Exocarp (or epicarp), mesocarp, and endocarp

What special type of berry, illustrated in this diagram, features a leathery pericarp with oil glands in pits and soft segmented pulp?

Hesperidium

What type of dry indehiscent fruit contains a single seed that adheres directly to the surrounding fruit wall, as seen in cereal grains like rice and corn?

Caryopsis

How are recalcitrant seeds characterized regarding moisture content reduction and storage temperature?

They cannot be dried below critical moisture levels ($12\text{--}30\%$) without losing viability and are sensitive to low-temperature chilling or freezing.

What leaf venation pattern is typical of monocotyledonous plants compared to dicotyledonous plants?

Parallel venation

In the cross-section of stems shown below, how does the arrangement of vascular bundles differ between the monocot (left) and dicot (right)?

In monocot stems, vascular bundles are scattered throughout the ground tissue, whereas in dicot stems, they are arranged in a ring or circle.

What type of germination, typical of dicots, occurs when hypocotyl elongation raises the cotyledons above the soil surface?

Epigeal germination

In monocotyledonous plants, floral parts typically occur in multiples of what number?

Multiples of 3 (or in 3s)