Crop Science Practice Questions Review

Comprehensive practice flashcards covering Crop Science concepts including plant physiology, biology, breeding, and agricultural practices based on the provided sample questions.

According to the transcript, early civilizations in Asia established a diet basically consisting of which two food items?

Rice and beans

Which race of people is currently regarded as the first agriculturists?

Cushites

The Indochinese-Indonesian region is believed to be the center of origin for which crop?

Coconut

What is the center of origin for rice (Oryza sativa)?

India

In which plant cells is chlorophyll commonly found?

Mesophyll cells

Light absorption by a leaf is lowest in which color of the spectrum?

Green

Kranz anatomy is a leaf characteristic found in which type of plants?

$C_4$ plants

An RQ value equal to $1$ indicates that which substance is being respired?

Glucose

What is the main path for the movement of inorganic substances in plants?

Xylem

Which phytohormone is also referred to as the ripening hormone?

Ethylene

What is the term for the growth response of plants to the direction of light?

Phototropism

In the equation $Y = f[G+E+(G \times E)]$, what does the variable $G$ represent?

Genotype

According to the transcript, an area is in absolute drought if there is no rainfall of at least $0.25\,mm$ for how many consecutive days?

15 consecutive days

What is the desirable soil structure for crops?

Granular

What are the specific products of the light reaction phase of photosynthesis?

ATP and NADPH

Rice is a $C_3$ species because its first stable product of photosynthesis is which 3-carbon acid?

3-phosphoglyceric acid

Where specifically does the Krebs cycle take place within the cell?

Mitochondrion

The ascent of cell sap from roots to leaves is primarily driven by what?

Water tension gradient

In a tetrazolium test, what color will viable seeds stain?

Red

In seed germination, what is the photoreceptor involved in photoperiodism?

Phytochrome

What is the term for the movement of substances against a concentration or chemical gradient?

Active transport

What is the term for the final phase in plant development involving the natural termination of functional life?

Senescence

Which growth hormone probably influences phototropism in plants?

Indole acetic acid (IAA)

How many anthers are typically found in a rice floret?

6

What is the most effective desiccant listed for seed storage, requiring the smallest amount?

Silica gel

What term defines seeds like mangosteen and marang that do not store well and must be germinated within a week?

Recalcitrant seeds

What is the leading agricultural export crop of the Philippines?

Coconut

What was the food production strategy of the 1960's and 70's designed to solve world hunger using new technologies?

Green Revolution

What is the term for the arrangement of individual soil particles into compound particles or aggregates?

Soil structure

A bacteria that lives symbiotically with legumes and is capable of fixing nitrogen is known as what?

Rhizobium