Biology questions
20584 published questions with worked solutions.
- Extraembryonic membranes, chorion and amnion are formed by
- Which layer develops first during embryonic development?
- Inner mass of cell or embryoblast give rise to
- At what stage in test-tube babies, the zygote is implanted in human female?
- Which of the following embryonic membrane structure is excretory in function?
- In humans all the three germ layers originated from
- The correct sequence of embryonic development is
- The main function of trophoectoderm in mammalian embryo is
- Select the correct human developmental stages and its place of occurrence in normal pregnant woman
- Notochord, skeletal system and dermis of the skin are the derivatives ofNot in NEET syllabus
- Human chorionic gonadotropin is secreted by
- Which extra-embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
- Relaxin (a hormone) is secreted by
- The hormone that prepares and maintains the uterus during pregnancy is secreted by
- Structure connecting the foetus to placenta is
- Placenta secretes
- Which is formed in gastrulation?
- Human placenta is derived from
- The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?
- Exact time of human gestation period is