It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect:

Related Mcqs:

1. It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect?

   A. Older sediment layers have equal amount of these radioactive isotopes as that of the young ones
   B. Older sediment layers have less amount of these radioactive isotopes as that of the young ones.
   C. Older sediment layers have greater amount of these radioactive isotopes as that of the young ones.
   D. Older sediment layers did not have these radioactive isotopes

2. Type of lichen which tightly attaches to rocks is_____________?

   A. Parmelia
   B. Fruticose
   C. Foliose
   D. Crustose

3. Lipid molecules can store double amount of energy as compared to same amount of carbohydrate because of high number of__________________?

   A. C-C bonds
   B. C-H bonds
   C. C-N bonds
   D. C-O bonds

4. Which of the following statement about fatigue is correct?

   A. The major event in it is accumulation of lactic acid.
   B. Lactic acid accumulation turns pH in acidic range leading to muscle ache.
   C. Ionic imbalance may also cause it.
   D. All of these

5. Which of the following statement about conifers is correct?

   A. Stored excretory products in vacuoles, at a concentration that leads to crystal formation.
   B. Accumulate waste in leaves, which fall in autumn.
   C. Production of black wood in the center.
   D. Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants.

6. Marine fish can keep their internal environment hypertonic with respect to the surrounding salty water by retaining.

   A. Excessive urea which will increase their internal solute concentration and prevent body shrinkage in hypertonic environment
   B. Trimethyl alanine
   C. Ammonia
   D. Trimethylamine oxide

7. Microspore of a seed plant that contain male gametophyte including the gamete is called_______________?

   A. Pollen grain
   B. Ovule
   C. Microgametophyte
   D. Microsporangium

8. All of the following contain cartilage except:___________?

   A. Larynx
   B. Trachea
   C. Bronchi
   D. Bronchioles

9. Which organelles contain its own DNA?

   A. nucleus
   B. mitochondria
   C. chloroplast
   D. All of these

   Submitted by: Kiran Zafar

10. Which of the following cell organelles does not contain DNA?

    A. Nucleus
    B. Lysosomes
    C. Chloroplast
    D. None of these

    Submitted by: Nayab Idrees