The plantain reproduces asexually by
- A. suckers
- B. buds
- C. fragments
- D. spores
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
A flower showing radial symmetry is said to be
- A. pentamerous
- B. protandrous
- C. protogynous
- D. actinomorphic
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
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 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
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 oxidative part of the respiratory process takes place in the
- A. mitochondria
- B. ribosomes
- C. endoplasmic reticulum
- D. golgi bodies
One cubic centimeter of lymph is richer than an equal volume of blood in
- A. erythrocytes
- B. leucocytes
- C. amino acid
- D. glucose
In the standard experiment to show that oxygen is given off during photosynthesis, sodium bicarbonate is used to
- A. neutralize the acid in water
- B. supply mineral salt to water plant
- C. supply carbondioxide for photosynthesis
- D. kill micro-organisms in water
Which of the following lists of organs is directly involved in nutrition?
- A. Oesophagus, bronchus, stomach, pancreas and anus
- B. spleen, pharynx, duodenum, jejunum and rectum
- C. Teeth, oesophagus, ileum lungs and large intestine
- D. Salivary gland, liver, stomach, villi and colon
The vitamin which is important in the formation of the retina pigment is
- A. vitamin A
- B. vitamin B
- C. vitamin C
- D. vitamin D
In demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to
- A. prevent alga growth in culture solution
- B. allow root growth
- C. prevent breakdown of mineral elements
- D. prevent photosynthesis in the root
Secondary thickening is initiated in a dicotyledonous stem by the
- A. xylem parenchyma
- B. secondary phloem
- C. endodermis
- D. cambium
The correct sequence of tissues in the anatomy of a young dicotyledonous stem from the inside to the outside is
- A. pith, phloem, cambium, xylem, parenchyma, collenchyma and epidermis
- B. xylem, phloem, cambium, cortex, endodermis, collenchyma and epidermis
- C. pith, xylem, cambium, phloem, collenchyma, parenchyma and epidermis
- D. phhloem, xylem, cambium, cortex, endodermis, collenchyma and epidermis
In the life history of butterfly, destruction of crops is caused by the
- A. maggot
- B. nymph
- C. caterpillar
- D. pupa
Which of the following is not a characteristics of snail?
- A. Bilateral symmetry
- B. Chitinous exoskeleton
- C. Muscular foot
- D. soft unsegmented body in mantle
In tapeworm, the two structure that run throughout the length of the body are the
- A. nerve cord and excretory duct
- B. sperm duct and the nerve cord
- C. genital pore and the excretory duct
- D. sperm duct and the genital pore
In the reproduction of mosses, water is essential because
- A. they live in moist habitats
- B. they cannnot reproduce without water
- C. the male ganetes must swim to fertilize the ovum
- D. they produce spores
In most true ferns sporangia are grouped into
- A. indusium
- B. fronds
- C. prothalli
- D. sari
The hypha of Rhizopus is said to be non septate because it
- A. does not contain chlorophyll
- B. has no cross walls
- C. is vacuolated
- D. stores oil globules