One cubic centimeter of lymph is richer than an equal volume of blood in

A. erythrocytes

B. leucocytes

C. amino acid

D. glucose

The oxidative part of the respiratory process takes place in the

A. mitochondria

B. ribosomes

C. endoplasmic reticulum

D. golgi bodies

Fatigue of leg muscles may occur after riding many kilometers on a bicycle because of

A. insufficient glucose

B. excess carbon dioxide

C. excess protein

D. insufficient oxygen

The function of the loop of Henle is to

A. increase the flow of urine

B. concentrate amino acids in the kidney tissue

C. concentrate sodium chloride in the medulla of the kidney

D. increase the volume of urine

Sclerenchyma cells are lignified to

A. strengthen and support the plant

B. transport synthesized food

C. conduct water and salt

D. protect the plant from injury

The pineapple fruit is best described as

A. aggregate, succulent and indehiscent

B. aggregate, succulent and dehiscent

C. multiple, succulent and indehiscent

D. multiple, succulent and dehiscent

A flower showing radial symmetry is said to be

A. pentamerous

B. protandrous

C. protogynous

D. actinomorphic

A samara differs from a cypsela by having

A. an extended pericarp

B. a hard pericarp

C. a pericarp fused with seed coat

D. some hairy outgrowth on the pericarp

The plantain reproduces asexually by

A. suckers

B. buds

C. fragments

D. spores

Growth can best be determined in a population of Spirogyra by measuring the

A. total length of the filament

B. total widths of the filaments

C. rate of photosynthesis in the population

D. dry weights of the organism