Start learning →

NEET UG Unit 8N: Ecosystem Services, Succession & Global Change — practice questions — page 2

Explore 61 free Unit 8N: Ecosystem Services, Succession & Global Change questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

Practise Unit 8N: Ecosystem Services, Succession & Global Change with Quill →

Unit 8N: Ecosystem Services, Succession & Global Change questions and exercises with answers

Showing questions 31–60 of 61.

In the dicot root the number of xylem and phloem patches isRead the answer and worked solution →The monocot root differs from the dicot root in havingRead the answer and worked solution →Hypodermis of a typical dicot stem is composed ofRead the answer and worked solution →In the dicot stem, the endodermis is also called theRead the answer and worked solution →The vascular bundles in the dicot stem areRead the answer and worked solution →In monocot stems, the vascular bundles areRead the answer and worked solution →In a dicot leaf, the mesophyll is differentiated intoRead the answer and worked solution →Stomata are MORE numerous on which leaf surface in a dicot?Read the answer and worked solution →The endarch protoxylem position is seen inRead the answer and worked solution →The conjuctive tissue in a dicot root liesRead the answer and worked solution →Pericycle in the dicot root gives rise toRead the answer and worked solution →All tissues inside the endodermis of a root collectively form theRead the answer and worked solution →Sclerenchymatous bundle sheaths surround vascular bundles inRead the answer and worked solution →In a dicot stem cross section, medullary rays areRead the answer and worked solution →Which feature is CHARACTERISTIC of an isobilateral (monocot) leaf?Read the answer and worked solution →Phloem parenchyma is GENERALLY ABSENT inRead the answer and worked solution →Conjoint, open and endarch vascular bundles arranged in a ring are diagnostic ofRead the answer and worked solution →The cuticle is generally ABSENT inRead the answer and worked solution →The cells next to phloem on the inner side of dicot stem endodermis formRead the answer and worked solution →Vasa recta is the structural analog (functional, not anatomical) in PLANTS ofRead the answer and worked solution →Which option correctly matches symmetry in echinoderms at different life stages?Read the answer and worked solution →Which of the following is mentioned as an exception among sponges because it exhibits radial symmetry?Read the answer and worked solution →Most members of which phylum are asymmetrical?Read the answer and worked solution →According to the content provided, animals from Aschelminthes up to Chordata generally show which level of organisation?Read the answer and worked solution →Which pair of phyla is correctly matched with tissue level of organisation?Read the answer and worked solution →In the basis of animal classification, members of Porifera show which level of organisation?Read the answer and worked solution →The true coelom in many animals is formed by splitting of the mesoderm. This type of coelom formation is called:Read the answer and worked solution →Which one of the following is correctly matched?Read the answer and worked solution →An animal is called a true coelomate when its body cavity is:Read the answer and worked solution →Coelom is best defined as:Read the answer and worked solution →

Worked practice questions

In the dicot root the number of xylem and phloem patches is

  1. Always more than twenty bundles
  2. Usually two to four (oligoarch)
  3. Usually more than six (polyarch)
  4. Always a single bundle pair
Show answer and solution

Correct answer: B. Usually two to four (oligoarch)

Dicot roots are typically diarch to tetrarch (2-4 xylem patches). Monocot roots are polyarch (more than six). Pith is small in dicot roots, large in monocot roots.

Open this question →

The monocot root differs from the dicot root in having

  1. Polyarch xylem and large pith inside
  2. Diarch xylem and small pith inside
  3. Open vascular bundles with cambium
  4. Secondary growth via vascular cambium
Show answer and solution

Correct answer: A. Polyarch xylem and large pith inside

**Monocot root features:** polyarch (>6) xylem, large pith, no cambium and hence no secondary growth. Dicot roots have 2-4 xylem patches, small pith and (later) secondary growth via cambium.

Open this question →

Hypodermis of a typical dicot stem is composed of

  1. Phloem fibres bearing sieve tubes
  2. Collenchyma giving mechanical strength
  3. Sclerenchyma giving rigid support
  4. Parenchyma with intercellular spaces
Show answer and solution

Correct answer: B. Collenchyma giving mechanical strength

Dicot stem hypodermis = collenchymatous (mechanical support in a young growing stem). Monocot stem hypodermis = sclerenchymatous (mature mechanical support; monocots lack secondary growth).

Open this question →

How to practise

  1. Choose a Unit 8N: Ecosystem Services, Succession & Global Change question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Unit 8N: Ecosystem Services, Succession & Global Change practice for NEET UG. Read explanations as you go. No signup form needed to start.

Practise Unit 8N: Ecosystem Services, Succession & Global Change →

More Biology topics

Genetics and EvolutionReproduction in Organisms & PlantsBiotechnology and ApplicationsBiodiversity and ConservationThe Living World & Biological ClassificationNeural Control and Chemical CoordinationPrinciples of Inheritance and VariationAnimal Kingdom