What body systems may be impacted if a mother drinks alcohol during pregnancy and causes developmental problems to the endoderm?
A. The outer layers of the digestive and respiratory systems may not be as functional as they should.
B. The epithelial lining of the digestive and respiratory systems may not be as functional as they should be.
C. The epithelial lining of the digestive and reproductive systems may not be as functional as they should be.
D. The epidermis and the epithelial lining of the oral cavity may not be as functional as they should.
Answer: B
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Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?
A) None of the organisms depicted by the tree ate the same foods. B) Some of the organisms depicted by the tree had lived in different habitats. C) The skeletal remains of the organisms depicted by the tree were incomplete (in other words, some bones were missing). D) Transitional fossils had not been found. E) Relationships between DNA sequences among the species did not match relationships between skeletal patterns.
Explain how proteins that are produced in a cell are correctly directed to the cytosol, the endomembrane system, and
the mitochondria.
What will be an ideal response?One of the two main functions of the nuclear envelope is to ____.
A. provide residence for ribosomes B. allow separation of DNA from cytoplasm machinery C. provide total isolation of nuclear components D. enable faster cell division E. enable larger cell size
Evolutionary adaptations for survival on land produced tetrapods, which later evolved into
A) amphibians only. B) amphibians, reptiles, and mammals. C) reptiles only. D) birds only.