Options:
- A. Nonliving cells
- B. Siliceous wall
- C. Mucilaginous wall
- D. Water proof cell
View Answer
B. Siliceous wall
Biology
The part of the brain that connects the two hemispheres of the brain is called____________?
Options:
- A. Corpus callosum
- B. Medulla oblongata
- C.
- D.
View Answer
A. Corpus callosum
Cell wall is extremely well preserved in fossil specimens in__________?
Options:
- A. Diatoms
- B. Dinoflagellates
- C. Slime moulds
- D. None of these
View Answer
A. Diatoms
In which phase of cell cycle cell organelles are formed?
Options:
- A. S Phase
- B. G1 Phase
- C. G2 Phase
- D. G0 Phase
View Answer
C. G2 Phase
Empty diatom cells are called___________?
Options:
- A. Raphe
- B. Valves
- C. Frustule
- D. Girdles
View Answer
C. Frustule
Vacuoles are fluid filled sacs surrounded by a membrane called__________?
Options:
- A. tonoplast
- B. nuclear membrane
- C. cell membrane
- D. cell wall
View Answer
A. tonoplast
Diatom frustule/ shell is made of_____________?
Options:
- A. Silica
- B. Calcium carbonate
- C. Manesium carbonate
- D. Both B. and C.
View Answer
A. Silica
During the process of cell division which of the following divides first?
Options:
- A. cytodplasm
- B. vacuoles
- C. mitochondria
- D. nucleus
View Answer
D. nucleus
The chloroplasts of diatoms and chrysophycean algae do not possess____________?
Options:
- A. Chloryphyllpigments
- B. Enzymes for photolysis
- C. Defined grana and stroma
- D. Carotenes with chlorophylls
View Answer
C. Defined grana and stroma
Which of the following manufactures carbohydrates by the process of photosynthesis?
Options:
- A. chloroplast
- B. chromoplast
- C. leucoplast
- D. All of these
View Answer
A. chloroplast