Options:
- A. One Second
- B. Two Seconds
- C. Three Seconds
- D. Four Seconds
View Answer
A. One Second
Biology
Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.
Options:
- A. Bacteria
- B. Viruses
- C. Fungi
- D. Cyanobacteria
View Answer
C. Fungi
Purine and pyrimidine metabolism results in production of____________?
Options:
- A. Creatinine
- B. Trimethyamine oxide
- C. Xanthine
- D. None of these
View Answer
C. Xanthine
Animals that produce metabolic heat at low level and also absorb heat from the surroundings are called__________?
Options:
- A. Endotherms
- B. Ectotherms
- C. Heterotherms
- D. Homeotherms
View Answer
C. Heterotherms
Which of the following statement about Homeostasis is incorrect?
Options:
- A. There is a definite control system that regulates the homeostatic activities
- B. Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment
- C. Because of this the fluctuations of internal environment are of extremely narrow range as compared to that of external environment
- D. All are correct
View Answer
B. Homeostatic mechanisms keep the internal environment fixed despite of wide changes in external environment
Nephrostome in earthworm opens in____________?
Options:
- A. External space
- B. Internal Body cavity
- C. In gut
- D. In Bladder
View Answer
B. Internal Body cavity
Diatoms belong to___________?
Options:
- A. Chrysophyta
- B. Bacillariophyceae
- C. Xanthophyceae
- D. Both A. and B.
View Answer
D. Both A. and B.
Golden brown colour of diatoms is due to presence of__________?
Options:
- A. Mycoxanthin, mucoxanthin and myxoxanthophylls
- B. Alpha and beta carotenes and myxoxanthin
- C. Fucoxanthin, diatoxanthin, diadinoxanthin
- D. None of the above
View Answer
C. Fucoxanthin, diatoxanthin, diadinoxanthin
Which of the following endoplasmic reticulum has no ribosome on its surface?
Options:
- A. smooth
- B. rough
- C. both
- D. all of above
View Answer
A. smooth
The normal pH of human blood is____________?
Options:
- A. 6.4
- B. 7.0
- C. 7.4
- D. 7.5
View Answer
C. 7.4