If calcium is deficient in food this may cause
- A. anaemia
- B. retarded growth
- C. sterility
- D. goitre
- E. beri-beri
A food substance which produces red colouration with Sudan III contain
- A. protein
- B. sugar
- C. starch
- D. cellulose
- E. fat
Which of the following represents the sequence of protein hydrolysis? 1. polypeptides 2. Amino acides 3. Proteins 4. Peptones
- A. 3 → 1 → 2 → 4
- B. 3 → 2 →4 → 1
- C. 3 → 1 →2 → 4
- D. 3 → 4 → 1 → 2
- E. 3 → 1 → 4 → 2
Which of the following is common to a dicotyledonous stem and monocotyledonous root?
- A. Medullary rays
- B. Central pith
- C. Wide cortex
- D. Narrow cortex
- E. Pericycle fibres
A group of similar cells performing the same function is
- A. an organ
- B. a system
- C. a tissue
- D. an organelle
- E. an enzymes
In an angiosperm leaf, the xylem is
- A. beside the phloem
- B. surrounded by trhe phloem
- C. above the phloem
- D. around the phloem
- E. in separate bundles from the phloem
In lower plants like mosses, the structure which performs the functions of roots of higher plants is called
- A. root hairs
- B. rootlets
- C. hypae
- D. rhizoids
- E. thalli
At what stage in the life history of a toad is its mode of breathing similar to that of fish?
- A. Tadpole stage
- B. External gill stage
- C. Adult stage
- D. Internal gill stage
- E. Larval stage
Bryophtes are different from flower because they
- A. live in moist habita
- B. are small plants
- C. reproduce sexually and asexually
- D. have small leaves
- E. have no vascular tissue
which of the following is NOT true of mucor? it
- A. contains chlorophll
- B. grows saprophytically
- C. bears spores in sporangium
- D. consist of hypae
- E. reproduces by conjugation
Euglene is an autotrophic organism because it
- A. has flagella
- B. has plant and animal features
- C. is found in water
- D. can manufacture its food
- E. move fast
In fish the sense organs which detect movements in water are located within the
- A. gills
- B. operculum
- C. nostrils
- D. median fin
- E. lateral line
Each of the following is an anthropod EXCEPT the
- A. crab
- B. spider
- C. snail
- D. milipede
- E. cockroach
Which of the following is seed bearing?
- A. Mosses
- B. Whistling pine
- C. Algal filament
- D. liverwort
- E. Fern fronds
In which of the following groups of animals are flagella and cilia found?
- A. Flatworms
- B. Annelids
- C. Coelenterates
- D. protozoa
- E. Nematodes
In spirogyra, the pyrenoid
- A. excretes waste products
- B. is suspended by cytoplasmic strands
- C. is mainly used for respiration
- D. usually contains starch
- E. makes the plants slimy to touch
The process of soil erosion is usually from
- A. rill → sheet → gully
- B. gully → rill → sheet
- C. sheet → guly → rill
- D. sheet → rill → gully
- E. rill → gully → sheet
Leaching is
- A. Washing away of humus from the soil surface
- B. reducing of soil aeration by pressure
- C. soil erosion by means other than rainfall
- D. loss of organic matter due to exposure to direct sunlight
- E. washing out chalk and limestone from upper layers of by heavy rains
Denitrifying bacteria in nature liberate gaseous nitrogen directly from
- A. ammonium salts
- B. soil nitrates
- C. thunderstorms
- D. soil nitrites
- E. plant and animal proteins
If a handful of soil is shaken with water and left to settle, the soil particles will settle from light to heavy particles as follows
- A. humus, clay, silt, sand, stones
- B. humus, silt, clay, sand, stones
- C. humus, clay,silt, stones, sand
- D. humus, sand, silt, clay, stones
- E. clay, humus, silt, sand, stones
Erosion can be reduced along shape by
- A. ridging across slope
- B. ridging up slope
- C. ridging down slope
- D. crop rotation
- E. bush fallowing system