Answer the following question given this paragraph: The Breasts Whereas the breasts are located far from the other female reproductive organs, they are considered accessory organs of the female reproductive system. The function of the breasts is to supply milk to an infant in a process called lactation. The external features of the breast include a nipple surrounded by a pigmented areola (Figure 27.17), whose coloration may deepen during pregnancy. The areola is typically circular and can vary in size from 25 to 100 mm in diameter. The areolar region is characterized by small, raised areolar glands that secrete lubricating fluid during lactation to protect the nipple from chafing. When a baby nurses, or draws milk from the breast, the entire areolar region is taken into the mouth. Breast milk is produced by the mammary glands, which are modified sweat glands. The milk itself exits the breast through the nipple via 15 to 20 lactiferous ducts that open on the surface of the nipple. These lactiferous ducts each extend to a lactiferous sinus that connects to a glandular lobe within the breast itself that contains groups of milk-secreting cells in clusters called alveoli (see Figure 27.17). The clusters can change in size depending on the amount of milk in the alveolar lumen. Once milk is made in the alveoli, stimulated myoepithelial cells that surround the alveoli contract to push the milk to the lactiferous sinuses. From here, the baby can draw milk through the lactiferous ducts by suckling. The lobes themselves are surrounded by fat tissue, which determines the size of the breast; breast size differs between individuals and does not affect the amount of milk produced. Supporting the breasts are multiple bands of connective tissue called suspensory ligaments that connect the breast tissue to the dermis of the overlying skin. Q: Breasts are considered accessory organs of what body system? Choices: - digestive system - nervous system - lymphatic system - female reproductive system A:
female reproductive system
Answer the following question given this paragraph: Binary fission occurs when a parent cell simply splits into two daughter cells. This method is described in detail in the lesson "Cell Division. " Bacteria reproduce this way. You can see a bacterial cell reproducing by binary fission in Figure below . Q: How does bacteria reproduce? Choices: - sexual reproduction - budding - pollination - binary fission A:
binary fission
Q: Answer the following question given this paragraph: Q: Mammals generally lack a cloaca and have a separate opening for the what? Choices: - urinary tract - tissues tract - physical tract - digestive tract A:
A: digestive tract
Question: Answer the following question given this paragraph: Thermal energy can be trapped in Earth's atmosphere by gases such as CO2, water vapor, methane, and chlorofluorocarbons before it can be radiated into spacelike the effect of a greenhouse. It is not yet clear how large an increase in the temperature of Earth's surface can be attributed to this phenomenon. Venus is an example of a planet that has a runaway greenhouse effect. The atmosphere of Venus is about 95 times denser than that of Earth and contains about 95% CO2. Because Venus is closer to the sun, it also receives more solar radiation than Earth does. The result of increased solar radiation and high CO2 levels is an average surface temperature of about 450C, which is hot enough to melt lead. Data such as those in Figure 5.22 "Changes in Atmospheric CO" indicate that atmospheric levels of greenhouse gases have increased dramatically over the past 100 years, and it seems clear that the heavy use of fossil fuels by industry is largely responsible. It is not clear, however, how large an increase in temperature (global warming) may result from a continued increase in the levels of these gases. Estimates of the effects of doubling the preindustrial levels of CO2 range from a 0C to a 4.5C increase in the average temperature of Earth's surface, which is currently about. Q: Gases such as co2 and methane can trap what energy in earth's atmosphere, before radiating it into space? Choices: - mechanical energy - sunlight energy - potential energy - thermal energy A:
Answer: thermal energy
*Question*
Answer the following question given this paragraph: Cell division is part of the life cycle of virtually all cells. Cell division is the process in which one cell divides to form two new cells. Q: What is the process in which one cell divides to form two new cells called? Choices: - cell direction - cell contribution - Cell Formation - cell division A:
**Answer**
cell division
(Question)
Answer the following question given this paragraph: Many species use their body shape and coloration to avoid being detected by predators. The tropical walking stick is an insect with the coloration and body shape of a twig, which makes it very hard to see when it is stationary against a background of real twigs (Figure 19.15a). In another example, the chameleon can change its color to match its surroundings (Figure 19.15b). Q: Many species use their body shape and coloration to avoid being detected by what? Choices: - biology - viruses - males - predators A:
(Answer)
predators