Options:
- A. Sac
- B. Tube
- C. Circulatory system
- D. Respiratory system
View Answer
B. Tube
Biology
in animals meiosis produces____________?
Options:
- A. spores
- B. gametes
- C. both a & b
- D. all the above
View Answer
B. gametes
Which of the following statement about alternation of generation in bryophytes is incorrect?
Options:
- A. It involves alternation of morphologically different generations
- B. Their gametophyte is independent while sporophyte depends upon gametophyte for nutrition.
- C. Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization
- D. Spore formation occurs through meiosis
View Answer
C. Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization
In which group of tracheophytes ovules are born on the exposed surface of megasporophylls______________?
Options:
- A. Spheospsida
- B. Filicineae
- C. Gymnosperms
- D. Angiosperms
View Answer
C. Gymnosperms
Chemically auxins are____________?
Options:
- A. Indole propionic acid.
- B. Indole carboxylic acid.
- C. Indole acetaldehyde
- D. Indole acetic acid.
View Answer
D. Indole acetic acid.
Secretin is a hormone produced by___________?
Options:
- A. Stomach
- B. Liver
- C. Pancreas
- D. Duodenum
View Answer
D. Duodenum
Which of the following are responsible for the detection of changes in environment?
Options:
- A. Receptors
- B. Neurons
- C. Effectors
- D. All of these
View Answer
A. Receptors
Reflex actions below the neck are under control of____________?
Options:
- A. Brain
- B. Spinal cord
- C. Hypothalamus
- D. none of these.
View Answer
B. Spinal cord
Cell wall is absent in___________?
Options:
- A. Cocci
- B. Bacilli
- C. Mycobacterium
- D. Mycoplasma
View Answer
D. Mycoplasma
All the animals of the grade radiata are____________?
Options:
- A. Diploblastic
- B. Triploblastic
- C. Both
- D. Unicellular
View Answer
A. Diploblastic