Start learning →

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

Explore 75 free Unit 8N: Ecosystem Services, Succession & Global Change questions in AP Biology 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 75.

Trichomes on the stem are usuallyRead the answer and worked solution →Parenchyma, collenchyma and sclerenchyma collectively form theRead the answer and worked solution →Vascular bundles in roots have xylem and phloem arrangedRead the answer and worked solution →In dicot stems, the cambium between xylem and phloem makes the vascular bundleRead the answer and worked solution →Casparian strips are found in theRead the answer and worked solution →Bulliform cells are found inRead the answer and worked solution →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 →

Worked practice questions

Trichomes on the stem are usually

  1. Photosynthetic green cells of leaf
  2. Multicellular branched or unbranched
  3. Unicellular like the root hairs are
  4. Vascular conducting structures
Show answer and solution

Correct answer: B. Multicellular branched or unbranched

Stem epidermal hairs (trichomes) are usually multicellular and may be branched or unbranched, soft or stiff, even secretory. They reduce transpiration and may deter herbivores.

Open this question →

Parenchyma, collenchyma and sclerenchyma collectively form the

  1. Mesophyll of the leaf blade only
  2. Ground tissue system of the plant
  3. Vascular bundle system of the plant
  4. Epidermal tissue of the surface
Show answer and solution

Correct answer: B. Ground tissue system of the plant

Ground tissue = all tissues other than epidermis and vascular bundles. It includes parenchyma (cortex, pith, mesophyll), collenchyma (mechanical) and sclerenchyma (mechanical and dead).

Open this question →

Vascular bundles in roots have xylem and phloem arranged

  1. In scattered bundles across cortex
  2. Radially on different radii
  3. Conjointly along same radius
  4. Bicollaterally around a central pith
Show answer and solution

Correct answer: B. Radially on different radii

Radial arrangement = xylem and phloem on different radii (typical of roots). Conjoint = same radius (typical of stems and leaves). Bicollateral = phloem on both sides of xylem (some Cucurbitaceae).

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 AP Biology. Read explanations as you go. No signup form needed to start.

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

More Biology topics

Unit 5C: Non-Mendelian Genetics & Population TransmissionUnit 2B: Membrane Transport, Tonicity & Cell SizeUnit 8K: Human Organ Systems & HomeostasisUnit 3B: Photosynthesis, Respiration & Cellular EnergyUnit 7B: Population Genetics & Hardy-Weinberg EvolutionUnit 2G: Osmoregulation & Membrane DynamicsUnit 8R: Environmental Pollution & Organismal HealthUnit 5D: Organismal Reproduction & Life Cycles