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AP Intermediate 2nd Year Ecology and Environment — practice questions

Explore 79 free Ecology and Environment questions in AP Intermediate 2nd Year Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Ecology and Environment questions and exercises with answers

Showing questions 1–30 of 79.

After microsporogenesis, the cells of the resulting microspore tetrad have a ploidy of:Read the answer and worked solution →The germ pores in a pollen grain are regions where:Read the answer and worked solution →In a mature 2-celled pollen grain at the time of shedding, the two cells present are:Read the answer and worked solution →Approximately what percentage of angiosperms shed pollen at the 2-celled stage?Read the answer and worked solution →In a typical angiosperm ovule, the small opening in the integuments through which the pollen tube usually enters is the:Read the answer and worked solution →A mature angiosperm embryo sac is typically:Read the answer and worked solution →Transfer of pollen grains from the anther to the stigma of the **same flower** is called:Read the answer and worked solution →Which of the following is the **only** type of pollination that brings genetically different pollen grains to the stigma?Read the answer and worked solution →Wind-pollinated flowers typically have all of the following features EXCEPT:Read the answer and worked solution →Production of unisexual flowers on different plants (each plant either male or female) is called:Read the answer and worked solution →In a plant breeding programme, removal of anthers from a flower bud before dehiscence is called:Read the answer and worked solution →The ploidy of the primary endosperm nucleus (PEN) in angiosperms is:Read the answer and worked solution →After double fertilisation, the zygote develops into the embryo while the:Read the answer and worked solution →Coconut water (the liquid inside a tender coconut) is best described as:Read the answer and worked solution →Triple fusion takes place in:Read the answer and worked solution →In a dicot embryo, the portion of the embryonal axis above the level of cotyledons is the:Read the answer and worked solution →In a monocot (grass) embryo, the cotyledon is called the:Read the answer and worked solution →NEET · Biology · Tap the ProducersRead the answer and worked solution →NEET · Biology · Trophic Levels — Memory FlipRead the answer and worked solution →NEET · Biology · Biodiversity Hotspot ↔ RegionRead the answer and worked solution →Which of these is a terrestrial ecosystem?Read the answer and worked solution →Which is a man-made ecosystem?Read the answer and worked solution →The basic energy input to any ecosystem is:Read the answer and worked solution →Green plants in an ecosystem are called:Read the answer and worked solution →Animals that feed directly on plants are:Read the answer and worked solution →Producers belong to which trophic level?Read the answer and worked solution →Energy movement through trophic levels is:Read the answer and worked solution →The rate of biomass production is called:Read the answer and worked solution →GPP minus respiration losses equals:Read the answer and worked solution →The rate at which consumers form new organic matter is:Read the answer and worked solution →

Worked practice questions

After microsporogenesis, the cells of the resulting microspore tetrad have a ploidy of:

  1. Diploid (2n)
  2. Haploid (n)
  3. Tetraploid (4n)
  4. Triploid (3n)
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Correct answer: B. Haploid (n)

Meiosis halves the chromosome number: PMC (2n) → tetrad of four **haploid (n)** microspores.

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The germ pores in a pollen grain are regions where:

  1. Cytoplasm is absent
  2. The intine is absent
  3. The exine is absent (no sporopollenin)
  4. The whole wall is absent
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Correct answer: C. The exine is absent (no sporopollenin)

**Germ pores** are apertures in the exine where **sporopollenin is absent** — the pollen tube emerges through one of these during germination.

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In a mature 2-celled pollen grain at the time of shedding, the two cells present are:

  1. Vegetative cell and generative cell
  2. Two male gametes
  3. Two synergids
  4. Egg cell and synergid
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Correct answer: A. Vegetative cell and generative cell

**Mature 2-celled pollen:** a **large vegetative cell** (with reserve food and irregular nucleus) and a **small spindle-shaped generative cell** floating in vegetative cell cytoplasm. The generative cell divides later to give two male gametes.

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More Biology topics

Genetics and EvolutionReproduction in Organisms & PlantsBiotechnology and ApplicationsBiology in Human Welfare & HealthReproductive HealthOrganisms and PopulationsBiodiversity and ConservationEvolution