What physiological processes are involved in lactation?
What will be an ideal response?
The hormone prolactin stimulates milk production in the mammary glands. Estrogen and progesterone inhibit milk production during pregnancy; these two hormones decline in concentration after birth, allowing milk production to begin. Colostrum is secreted after birth during the interval before milk becomes available. Milk production continues after birth while the infant is suckling, which stimulates the production of prolactin. Oxytocin causes milk ejection.
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Predation arose in prokaryotic organisms, increasing the complexity of interactions among organisms through their ability to engulf particulate food
A. true B. false
Endospores of certain bacterial species can enter tissues in the human body, germinate, and cause an infectious disease.
Answer the following statement true (T) or false (F)
Oxygen is required for ____________ to take place.
A. the electron transfer system B. light-dependent reactions C. light-independent reactions D. glycolysis
Figure 28.2
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The following question refers to the accompanying figure illustrating soil horizons.
Which soil horizon has no organic matter or weathered rock?
A. O Horizon B. A Horizon C. B Horizon D. C Horizon E. Bedrock