12 Questions
What is the purpose of gastrulation and organogenesis in early animal development?
To result in an organism's shape and body organization
What is the main focus of the first two stages of early animal development mentioned in the text?
Cell division and growth
How do animal embryos achieve a well-organized body according to the text?
By specific patterns of cell division, growth, and migration
What does morphogenesis refer to in animal development?
Biological processes leading to body shape and organization
Which of the following is a key requirement for a functioning body as per the text?
Well-defined axes and connections between cells
In early animal development, what do the stages of gastrulation and organogenesis primarily contribute to?
Shaping the organism's body and organization
What is the main difference between the mammalian blastula and blastocyst?
The blastocyst has an inner cell mass, while the blastula does not.
What is the significance of the blastocoel in embryonic development?
It serves as the body cavity of the developing embryo.
Why is polyspermy genetically incompatible with life?
It leads to the formation of non-viable zygotes.
What role do the 'fast block' and 'slow block' mechanisms play in fertilization?
They prevent polyspermy by blocking additional sperm from fertilizing the egg.
Which statement accurately describes cleavage during early embryonic development?
Cleavage leads to rapid division of cells without growth between divisions.
What is a defining feature of sperm cells in most animal species?
They possess specific features that allow them to fuse with egg cells.
Learn about the stages of development from a single cell zygote to a complex multicellular organism. Explore how cells divide, grow, and migrate in specific patterns during embryo development.
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