Answer the following question given this paragraph: Forest and Kim Starr (Flickr:Starr Environmental). Secondary succession occurs when nature reclaims areas formerly occupied by life . CC BY 2.0. Q: What occurs when nature reclaims areas formerly occupied by life? Choices: - typical succession - tertiary succession - primary succession - secondary succession A:
secondary succession
Answer the following question given this paragraph: Scientists often study the effects of environment on phenotype by studying identical twins. Identical twins have the same genes, so phenotypic differences between twins often have an environmental cause. Twin studies help understand the relative importance of environmental and genetic influences on individual traits and behaviors. Twins are a valuable source of information concerning the relationship between genes and environment. As monozygotic twins (identical) share their nuclear DNA, their polymorphisms , the nucleotide differences that make their DNA unique, are common to the two individuals. This means that any phenotypic variation, such as in height, intelligence, or any other measurable trait, is due to the environment. What is different about the experiences of the twins? What unique experiences might one twin have that the other twin did not have? By comparing phenotypes of hundreds of twins, researchers can understand the roles of genetics, shared environment and unique experiences in the formation and development of specific traits. Q: What is often the cause of phenotypic differences between identical twins? Choices: - natural selection - genetics - learned behavior - environment A:
environment
Q: Answer the following question given this paragraph: Q: What two substances do plants give off when they make food? Choices: - water and oil - carbon dioxide and oxygen - chlorophyll and nitrogen - oxygen and water A:
A: oxygen and water
Question: Answer the following question given this paragraph: Birds are thought to have evolved from theropod dinosaurs around 150 million years ago. Q: Birds are thought to have evolved around 150 million years ago from what? Choices: - teradactils - raptor dinosaurs - parrot dinosaurs - theropod dinosaurs A:
Answer: theropod dinosaurs
*Question*
Answer the following question given this paragraph: Potent oxidants are needed to oxidize the noble gases to form compounds in positive oxidation states. Q: What are needed to oxidize the noble gases to form compounds in positive oxidation states? Choices: - metal oxidants - protein oxidants - bacteria oxidants - potent oxidants A:
**Answer**
potent oxidants
(Q).
Answer the following question given this paragraph: [PCl 3][Cl 2] (0.135)(0.135) = = 0.021 0.87 [PCl 5] The equilibrium constant calculated from the equilibrium concentrations is equal to the value of Kc given in the problem (when rounded to the proper number of significant figures). Thus, the calculated equilibrium concentrations check. Kc =. Q: Because of their reactivity, we do not find most representative metals as free elements where? Choices: - in water - in the atomospher - underground - in nature A:
(A).
in nature