Answer the following question given this paragraph: Q: Differences between organisms reflect differences between their nucleotide sequences rather than between their what? Choices: - molecular codes - amino acids - environments - genetic codes A:
genetic codes
Answer the following question given this paragraph: Q: Impenetrable what underlies the soil of the forest? Choices: - structure - topsoil - groundwater - bedrock A:
bedrock
Q: Answer the following question given this paragraph: Ears pop as air pressures inside and outside of the ear equalize. Q: As air pressures inside and outside of the ear equalize, what phenomenon is produced? Choices: - eyes blinking - throat scratching - heart skipping - ear popping A:
A: ear popping
Question: Answer the following question given this paragraph: Mirrors and lenses are used in optical instruments to reflect or refract light. Optical instruments include microscopes, telescopes, cameras, and lasers. Q: What two things are used in optical instruments to reflect or refract light? Choices: - orientations and lenses - mirrors and magnifiers - prisms and microscopes - mirrors and lenses A:
Answer: mirrors and lenses
*Question*
Answer the following question given this paragraph: A drug known as RhoGAM, short for Rh immune globulin, can temporarily prevent the development of Rh antibodies in the Rh mother, thereby averting this potentially serious disease for the fetus. RhoGAM antibodies destroy any fetal Rh+ erythrocytes that may cross the placental barrier. RhoGAM is normally administered to Rh mothers during weeks 2628 of pregnancy and within 72 hours following birth. It has proven remarkably effective in decreasing the incidence of HDN. Earlier we noted that the incidence of HDN in an Rh+ subsequent pregnancy to an Rh mother is about 1314 percent without preventive treatment. Since the introduction of RhoGAM in 1968, the incidence has dropped to about 0.1 percent in the United States. Q: Rh antibodies can prove dangerous if they cross what barrier in pregnancy? Choices: - stomach - fungal - embryo - placental A:
**Answer**
placental
(Q).
Answer the following question given this paragraph: Potassium is a soft, silvery metal that ignites explosively in water. It easily loses its one valence electron to form positive potassium ions (K + ), which are needed by all living cells. Potassium is so important for plants that it is found in almost all fertilizers, like the one shown here. Potassium is abundant in Earth's crust in minerals such as feldspar. Q: Potassium is a soft, silvery metal that ignites explosively in what? Choices: - air - cold - acid - water A:
(A).
water