Which of the following hormones stimulates uterine contractions during the birth process in mammals?
A. oxytocin
B. vasopressin
C. adrenocorticotropin
D. gonadotropin
E. urocortin
A. oxytocin
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Axonemes grow out from a structure called a basal body located at the base of the cila or flagella. Based on this information where would you predict the plus end of the axonemal microtubules are located?
A. near the basal body B. near the tip of the axoneme C. at both ends of the axoneme D. It is not possible to predict from the information provided.
Answer the following statements true (T) or false (F)
1. Red blood cells are derived from endoderm. 2. The posterior end of the neural tube will develop into the brain. 3. Cleavage occurs after implantation into the lining of the uterus. 4. The probability of the immune system attacking a transplanted organ as opposed to transfused blood is higher.
Suppose a microbiologist wanted to identify the microbe responsible for a specific metabolic activity. To simultaneously assess metabolic activity and phylogenetic identity, the best technique would be ________.
A. metatranscriptomics B. optical tweezers with microelectodes C. isotope fractionation D. microautoradiography with fluorescent in situ hybridization (MAR-FISH)
As ice melts
A) hydrogen bonds are broken. B) water molecules become less tightly packed. C) the water becomes less dense. D) heat is released.