Source of commercial chewing gum latex is
Hevea brasiliensis
Carica papaya
Ficus elastica
Achras sapota
D.
Achras sapota
The latex of some plants is commercially important such as
(i) Source of commercial rubber is latex of Hevea brasiliensis, Ficus elastica, Cryptostegia. Maniho glaziou
(ii) Source of chewing or chickle gum is latex of Achras sapota
(iii) Source of enzyme papain is latex of Carica papaya
Match the following Columns.
| Column I (Cell Organelle) | Column II (Discovered by) |
| A. Ribosome | 1. Fontana |
| B. Nucleolus | 2. Tolbert and Yamazaki |
| C. Glyoxysome | 3. Palade |
| D. Peroxisome | 4. Beevers |
A – 1; B – 4; C – 2; D – 3
A – 3; B – 4; C – 1; D – 2
A – 1; B – 3; C – 2; D – 4
A – 3; B – 1; C – 4; D – 2
In which one of the family formations of endosperm doesn’t take place?
Orchidaceae
Cactaceae
Ranunculaceae
Malvaceae
Pyloric sphincter guards the opening between
Stomach and Duodenum
Cardia and Fundus
Oesophagus and Stomach
Fundus and Pylorus
A horse and a donkey can breed to produce mule which is an infertile animal. The infertility is because horse and donkey belong to different.
Class
Order
Species
Genus
Which one of the following is not correct pair of type of cancer and origin place?
Benign tumour – Non-cancerous tumour
Carcinomas – Cancer of epithelial tissues
Lymphomas – Haematopoietic cells tumour
Sarcomas – Cancer of glands (secretory tissues)
In cardiac cycle maximum time is taken by
Atria systole
Atria diastole
Ventricle systole
Ventricle diastole
Match the following Columns.
| Column I (organism) | Column II (Connecting Link) |
| A. Echina | 1. Between Annelida and Mollusca |
| B. Peripatus | 2. Between Reptiles and Mammals |
| C. Neopilina | 3. Between Annelida and Arthropoda |
| D. Protopterus | 4. Between Pisces and Amphibian |
A – 4; B – 3; C – 2; D – 1
A – 2; B – 3; C – 1; D – 4
A – 3; B – 1; C – 2; D – 4
A – 4; B – 2; C – 1; D – 3
