Answer the following statements true (T) or false (F)
1. Maternal effect genes are inherited via the mitochondria.
2. Epistasis often involves genes of an enzymatic pathway.
3. The actions of Xist result in an organism that is a phenotypic mosaic.
4. In biparental inheritance, paternal and maternal gametes provide chloroplasts to the zygote.
5. Genomic imprinting can result in offspring with identical genotypes that have different phenotypes.
1. FALSE
2. TRUE
3. TRUE
4. TRUE
5. TRUE
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A food web is a more realistic depiction than a food chain because:a
organisms rarely eat just one kind of food. b. energy flow is linear. c. energy flow is cyclic. d. a more complex model is always better than a simple one. e. matter cycles in ecosystems.
Sugar is translocated in phloem from a source, or an area of ____, to a sink, or an area of ____
a. low sugar concentration; high sugar concentration b. high sugar concentration; low sugar concentration c. positive water potential; negative water potential d. negative water potential; positive water potential e. low pressure; equally low pressure
A measure of wastewater treatment is its BOD. This measures the
A) biological organism density. B) biphosphate oxidizing demand. C) bacterial optimal density. D) biochemical oxygen demand. E) bioparticulate optical density.
If you wanted to increase the cation exchange and water retention capacity of loamy soil, you should _____
A) adjust the soil pH to 7.9 B) add clay to the soil C) practice no-till agriculture D) add fertilizer containing potassium, calcium, and magnesium to the soil E) increase the number of sand particles in the soil