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AP Biology Unit 5D: Organismal Reproduction & Life Cycles — practice questions

Explore 83 free Unit 5D: Organismal Reproduction & Life Cycles questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 5D: Organismal Reproduction & Life Cycles questions and exercises with answers

Showing questions 1–30 of 83.

In a plant, which reproduction type forms new plantlets from vegetative cells, buds or organs with no fusion of gametes?Read the answer and worked solution →The formation of a daughter individual from a small projection or bud on the parent body, as seen in yeast, is called:Read the answer and worked solution →Which two whorls of a typical flower are the non-essential or accessory whorls that do not directly take part in reproduction?Read the answer and worked solution →The male part of a flower, the androecium, is composed of stamens; each stamen consists of a filament and a:Read the answer and worked solution →The transfer of pollen from the anther to the stigma of a flower on another plant of the same species is called:Read the answer and worked solution →Pollination carried out with the help of wind is known as:Read the answer and worked solution →After fertilization in a flowering plant, the ovule and the ovary respectively develop into:Read the answer and worked solution →The cap-like acrosome at the anterior of a human sperm head is important because it contains:Read the answer and worked solution →In the male testes, which cells secrete testosterone that initiates the process of spermatogenesis?Read the answer and worked solution →In a normal 28-day menstrual cycle, the rupture of the Graafian follicle releasing the ovum takes place during which phase?Read the answer and worked solution →The onset of the menstrual cycle at puberty around 11-13 years of age is termed menarche, while its cessation around 48-50 years is called:Read the answer and worked solution →In humans, fertilization is internal and usually takes place in which part of the female reproductive tract?Read the answer and worked solution →The attachment of the blastocyst to the uterine wall (endometrium), occurring about 6 to 7 days after fertilization, is called:Read the answer and worked solution →Which posterior pituitary hormone stimulates the uterine contractions that expel the baby during parturition?Read the answer and worked solution →The first fluid released from the mammary glands after childbirth, rich in immune substances for the newborn, is called:Read the answer and worked solution →Which surgical contraceptive (sterilization) method in the male involves the ligation of the vas deferens?Read the answer and worked solution →A urinary tract infection in which bacteria lodge in the urinary bladder and multiply, causing inflammation, is known as:Read the answer and worked solution →Sexual reproduction in flowering plants begins withRead the answer and worked solution →Pollination by water is calledRead the answer and worked solution →The triploid endosperm formed in angiosperms is the result of fusion ofRead the answer and worked solution →In a typical anther, the wall layer that nourishes developing pollen grains is theRead the answer and worked solution →In a megaspore mother cell, meiosis producesRead the answer and worked solution →Apomixis isRead the answer and worked solution →The phenomenon of two or more embryos developing from one fertilised ovule is calledRead the answer and worked solution →Wind-pollinated flowers usually haveRead the answer and worked solution →In angiosperms, the haploid embryo sac is also calledRead the answer and worked solution →Tap the odd one outRead the answer and worked solution →Infections transmitted through sexual intercourse are collectively calledRead the answer and worked solution →Which of these is a sexually transmitted infection?Read the answer and worked solution →Which three sexually transmitted infections are NOT completely curable even when detected early?Read the answer and worked solution →

Worked practice questions

In a plant, which reproduction type forms new plantlets from vegetative cells, buds or organs with no fusion of gametes?

  1. Sexual reproduction
  2. Triple fusion
  3. Double fertilization
  4. Vegetative reproduction
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Correct answer: D. Vegetative reproduction

1. Vegetative reproduction forms new plantlets from vegetative (somatic) cells, buds or organs. 2. It has only mitotic division and no gametic fusion. 3. Daughter plants are genetically similar to the parent. 4. Sexual reproduction needs gamete fusion, and double fertilization/triple fusion are events within sexual reproduction, so they are ruled out. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 17 Reproduction in Plants and Animals "Vegetative Reproduction", p.250_

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The formation of a daughter individual from a small projection or bud on the parent body, as seen in yeast, is called:

  1. Budding
  2. Fission
  3. Fragmentation
  4. Regeneration
Show answer and solution

Correct answer: A. Budding

1. In budding, a bud (small projection) arises on the parent body and forms a daughter individual. 2. Yeast is the classic example given. 3. Fragmentation is breaking of a filament (Spirogyra), and fission is splitting into two daughter cells (Amoeba), so they are ruled out. 4. Regeneration is regrowth of a whole organism from lost parts (Hydra), so it is wrong. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 17 Reproduction in Plants and Animals "Budding", p.251_

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Which two whorls of a typical flower are the non-essential or accessory whorls that do not directly take part in reproduction?

  1. Androecium and gynoecium
  2. Calyx and corolla
  3. Stamens and carpels
  4. Anther and ovary
Show answer and solution

Correct answer: B. Calyx and corolla

1. A flower has four whorls: calyx, corolla, androecium and gynoecium. 2. The two outer whorls, calyx and corolla, are non-essential or accessory because they do not directly take part in reproduction. 3. Androecium and gynoecium (with their stamens and carpels) are the essential whorls, so those options are ruled out. 4. Anther and ovary are parts within the essential whorls, so that option is wrong. _Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 17 Reproduction in Plants and Animals "Parts of a Typical Flower", p.252_

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