The ________ provides enzymes that allow the sperm to digest a pathway through the zona pellucida to the oocyte.
A. chorion
B. acrosome
C. blastocyst
D. zygote
Answer: B
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Which outer layer of the blastocyst forms part of the placenta?
A. Trophoblast B. Embryoblast C. Yolk sac D. Amnion E. Blastocoel
Birds and mammals are similar in that
A) Both contain species that lay eggs. B) Both are endothermic. C) Both are part of a group of reptiles that includes the dinosaurs and crocodilians. D) A and B
Answer the following statements true (T) or false (F)
1. The SA node is located in the upper wall of the right atrium. 2. The Purkinje cells are tightly bound together to form the AV bundle. 3. Arteries that arise about an inch inferior to the celiac and deliver blood to the pancreas, small intestine and most of the large intestine are the inferior mesenteric arteries. 4. The terminal portions of the large intestine and rectum receive arterial blood from the superior mesenteric arteries.
What are two types of suture materials?
What will be an ideal response?