IB DP Biology- D3.1 Reproduction- IB Style Questions For SL Paper 1A -New Syllabus
▶️ Answer/Explanation
Label X points to the testis, which produces sperm. Label Y indicates the sperm duct (vas deferens), which transports sperm toward the urethra. Label Z corresponds to the seminal vesicle, a gland that contributes fluid to semen. ✅ Answer: (A)
▶️ Answer/Explanation
Answer: (C) Embryos
Explanation:
In in vitro fertilization (IVF)</strong), the egg and sperm are combined in a laboratory dish, where fertilization occurs outside the body. After fertilization, the resulting embryos are allowed to grow for a few days. Once they reach an early developmental stage, one or more embryos are transferred into the uterus, where they may implant and continue development.
Answer Evaluation:
A. Incorrect — Eggs are collected from the ovary and fertilized in the lab; they are not placed into the uterus.
B. Incorrect — Sperm fertilizes the egg in the lab, not inside the uterus during IVF.
C. Correct — Embryos are transferred into the uterus after fertilization.
D. Incorrect — A fetus is a later stage of development; IVF transfers embryos, not fetuses.
✅ Answer: (C)