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AP Biology Unit 8O: Population Growth & Carrying Capacity — practice questions

Explore 75 free Unit 8O: Population Growth & Carrying Capacity questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 8O: Population Growth & Carrying Capacity questions and exercises with answers

Showing questions 1–30 of 75.

**Reproduction** in animals is defined as:Read the answer and worked solution →In **asexual reproduction**, the daughter organisms produced from a single parent are:Read the answer and worked solution →**Gemmule formation** is an asexual reproductive method seen exclusively in:Read the answer and worked solution →External **budding** as a method of asexual reproduction is best illustrated by:Read the answer and worked solution →The **primary male sex organ** producing both sperms and the hormone testosterone is:Read the answer and worked solution →In humans, **fertilization** of the ovum normally occurs in the:Read the answer and worked solution →The **primary female sex organ** is:Read the answer and worked solution →The average duration of a normal human **menstrual cycle** is approximately:Read the answer and worked solution →**Ovulation** in a normal 28-day menstrual cycle is triggered by a sudden surge of:Read the answer and worked solution →The **acrosome** of a sperm is derived from which cell organelle?Read the answer and worked solution →**Leydig (interstitial) cells** of the testis secrete:Read the answer and worked solution →Sperms acquire **maturation** in which accessory duct of the male reproductive system?Read the answer and worked solution →Approximately what percentage of total semen volume is contributed by the **seminal vesicle**?Read the answer and worked solution →Each normal human ejaculate (2.5–4 mL of semen) contains approximately:Read the answer and worked solution →Presence of **human chorionic gonadotropin (hCG)** in maternal blood and urine indicates:Read the answer and worked solution →Which structure in the female external genitalia is **homologous** to the penis of the male?Read the answer and worked solution →During spermatogenesis, a single primary spermatocyte (2n) ultimately yields how many functional spermatozoa?Read the answer and worked solution →From menarche (≈13 yrs) to menopause (≈45 yrs), in approximately how many cycles does a female ovulate and thus how many eggs are released?Read the answer and worked solution →In which phase of the menstrual cycle does the endometrium reach its **maximum thickness** of 8–10 mm?Read the answer and worked solution →How many chromosomes are present in (i) a human secondary spermatocyte, and (ii) a mature spermatozoon?Read the answer and worked solution →Which of the following STIs is NOT completely curable when detected early?Read the answer and worked solution →The age group reported to have the highest incidence of sexually transmitted infections is:Read the answer and worked solution →Pelvic inflammatory disease (PID), ectopic pregnancy and infertility are best described as:Read the answer and worked solution →Inability to conceive despite unprotected sexual cohabitation for an extended period is termed:Read the answer and worked solution →In the In Vitro Fertilisation (IVF)/Test-Tube Baby programme, an early embryo with **up to 8 blastomeres** is transferred into the:Read the answer and worked solution →Male reproductive part of a flower is:Read the answer and worked solution →Pollination is the transfer of pollen from:Read the answer and worked solution →Endosperm of flowering plants is:Read the answer and worked solution →Fruit develops from:Read the answer and worked solution →Parthenocarpy is:Read the answer and worked solution →

Worked practice questions

**Reproduction** in animals is defined as:

  1. Growth of an organism from juvenile to adult
  2. Biological process of formation of new life from pre-existing similar life
  3. Daily metabolic activity needed for survival
  4. Repair or regrowth of lost body parts
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Correct answer: B. Biological process of formation of new life from pre-existing similar life

Reproduction is the biological process of forming new life forms from pre-existing similar life — it ensures continuity of species. Repair/regrowth is regeneration (distinct from reproduction).

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In **asexual reproduction**, the daughter organisms produced from a single parent are:

  1. Genetically diverse offspring
  2. Genetically identical clones
  3. Always sterile
  4. Always of the opposite sex
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Correct answer: B. Genetically identical clones

Asexual reproduction does not involve meiosis or gamete fusion. Single parent ⇒ daughters share the parent's genome exactly ⇒ they are clones.

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**Gemmule formation** is an asexual reproductive method seen exclusively in:

  1. Hydra
  2. Sponges (e.g. Spongilla)
  3. Planaria
  4. Amoeba
Show answer and solution

Correct answer: B. Sponges (e.g. Spongilla)

Gemmules are internal buds of dormant archaeocytes coated by amoebocytes — they form **only in sponges** and survive unfavourable conditions. Hydra buds externally Planaria fragments; Amoeba undergoes binary fission.

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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