Match the letter of each example from childbirth to the appropriate component of a positive feedback loop.A. Pituitary gland secretes oxytocin, which acts on the uterusB. Uterine contractions increaseC. Fetus is pushed against uterine openingD. Receptors detect stretchE. Brain receives and compares stretch informationEffector
What will be an ideal response?
A
A. pituitary gland secretes oxytocin, which acts on the uterus.
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A close evolutionary relationship between annelids and mollusks is suggested by the presence of a _____ larva in both phyla as well as by molecular sequence comparisons
A. trochophore B. lophophore C. radula D. bivalve E. none of these
The calyx is composed of ____
a. petals b. sepals c. stigmas d. ovules e. anthers
Describe two dosage compensation mechanisms found in animals
What will be an ideal response?
El Niño and La Niña ____.
A. both decrease water temperatures in the eastern Pacific Ocean B. both increase water temperatures in the eastern Pacific Ocean C. both increase water temperatures in the Gulf of Mexico D. cause more rain and less rain, respectively, in Australia E. cause fewer hurricanes and more hurricanes, respectively, in the North Atlantic