#Question id: 5612
#Unit 5. Developmental Biology
Outside the egg cell membrane is an extracellular matrix that forms a fibrous mat around the egg and is often involved in sperm-egg recognition. In invertebrates, this structure is usually called the:
#Question id: 5613
#Unit 5. Developmental Biology
Female mice with the CD9 gene knocked out are infertile because
#Question id: 5614
#Unit 5. Developmental Biology
One difference between the blastula and gastrula stages of development is that
#Question id: 5615
#Unit 5. Developmental Biology
The fast block to polyspermy is achieved by:
#Question id: 5616
#Unit 5. Developmental Biology
In the sperm the elevated Ca2+ level in a relatively basic cytoplasm triggers
#Question id: 5617
#Unit 5. Developmental Biology
In sea urchins and mammals, the rise in Ca2+ concentration responsible for the cortical granule reaction is due to