The information directing the development of the fertilized egg is provided by ____
a. the egg nucleus only
b. the sperm nucleus only
c. mRNAs in the egg cytoplasm only
d. proteins in the egg and sperm cytoplasm
e. the egg and sperm nuclei, mRNAs in the egg cytoplasm, and proteins in the egg cytoplasm
ANSWER: e
You might also like to view...
Viral infection is a major cause of cancer
a. True b. False Indicate whether the statement is true or false
In chordates, the ____ is a digestive system structure just posterior to the mouth
a. pharynx b. neural crest c. oral hood d. notochord e. cranium
Receptor tyrosine kinases (RTKs) are found at high levels on various cancer cells. A protein, Herceptin, has been found to bind to an RTK known as HER2. This information can now be utilized in breast cancer treatment if which of the following is true?
A) If Herceptin is found in the breast lymph nodes of the patient. B) If HER2, administered by injection, is in sufficient concentration. C) If the patient's cancer cells have detectable HER2. D) If the patient's genome codes for the HER2 receptor. E) If the patient's genome codes for the manufacture of Herceptin.
Which of the following represents a potential threat to biodiversity?
(a). People construct artificial reefs to support marine life. (b). Humans clear land for agriculture and housing. (c). Energy flows through an ecosystem, with much lost as heat. (d). Tropical rain forests and coral reefs are found where solar energy is the most abundant. (e). In a food chain, one population feeds on another.