Environmental Science and Ecology - Mock Test 63

Question 621

The cycling of elements in an ecosystem is called?

A) Chemical cycle B) Biogeochemical cycle C) Geological cycle D) Geochemical cycle

---

No Details

Question 622

Ecological pyramids are of?

A) Two types B) Three types C) Four types D) Five types

---

No Details

Question 623

Which one of the following is a reversible source of energy?

A) Petroleum B) Coal C) Nuclear fuel D) Trees

---

No Details

Question 624

What is contributed from the outer space in an ecosystem?

A) All the atmospheric gases B) Only carbon, hydrogen and oxygen C) Energy only D) All the above components

---

No Details

Question 625

The primary productivity is minimum in the following ecosystem?

A) Tropical rainforest B) Temperate grassland C) Tropical deciduous forest D) Desert shrub

---

No Details

Question 626

Ecosystem creates?

A) Food chains B) Food web C) Both a & b D) None of the above

---

No Details

Question 627

The decomposers in an ecosystem constitute the following trophic level?

A) T1 B) T3 C) T5 D) T4

---

No Details

Question 628

If precise quantitative measurements are made on a convined ecosystem in a laboratory, we will find amounts of which of the following to be a one-way flow rather than cyclic?

A) Carbon B) Potassium C) Nitrogen D) Free energy

---

No Details

Question 629

Tip of ecological pyramid is occupied by?

A) Herbivores B) Carnivores C) Producers D) None of these

---

No Details

Question 630

Which of the following is non-renewable source of energy?

A) Mineral B) Water C) Forest D) Solar energy

---

No Details