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AP Intermediate 1st Year Unit 2A: Ecosystem Services, Succession and Biodiversity — practice questions

Explore 13 free Unit 2A: Ecosystem Services, Succession and Biodiversity questions in AP Intermediate 1st Year Environmental Science. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 2A: Ecosystem Services, Succession and Biodiversity questions and exercises with answers

Showing questions 1–13 of 13.

Stomata are MORE numerous on which leaf surface in a dicot?Read the answer and worked solution →The conjuctive tissue in a dicot root liesRead 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 →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 →Conjoint, open and endarch vascular bundles arranged in a ring are diagnostic ofRead the answer and worked solution →Vasa recta is the structural analog (functional, not anatomical) in PLANTS ofRead the answer and worked solution →Pericycle in the dicot root gives rise toRead the answer and worked solution →Phloem parenchyma is GENERALLY ABSENT inRead the answer and worked solution →The endarch protoxylem position is seen inRead the answer and worked solution →

Worked practice questions

Stomata are MORE numerous on which leaf surface in a dicot?

  1. Adaxial (upper) surface of leaf
  2. Both surfaces in equal numbers
  3. Petiole and not lamina at all
  4. Abaxial (lower) surface of leaf
Show answer and solution

Correct answer: D. Abaxial (lower) surface of leaf

Dicot (dorsiventral) leaves bear most stomata on the abaxial (lower) surface the adaxial surface may have few or none. Monocot (isobilateral) leaves bear stomata on both surfaces equally.

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The conjuctive tissue in a dicot root lies

  1. Between epidermis and hypodermis
  2. Between bundle sheath and mesophyll
  3. Between xylem and phloem patches
  4. Between cortex and endodermis layer
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Correct answer: C. Between xylem and phloem patches

In a dicot root, parenchymatous cells between alternating xylem and phloem patches are called conjuctive tissue. Later, the cambium ring forms within this zone, initiating secondary growth.

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All tissues inside the endodermis of a root collectively form the

  1. Stele containing pericycle and bundles
  2. Cortex with parenchymatous cells
  3. Epiblema with root hair cells
  4. Casparian zone of suberin
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Correct answer: A. Stele containing pericycle and bundles

Stele = everything inside the endodermis: pericycle + vascular bundles + pith (if present) + conjuctive tissue. Cortex sits outside the endodermis. Epiblema is the root epidermis.

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