What is a key difference between autotrophs and heterotrophs?
a. Autotrophs harvest energy directly from the environment.
b. Autotrophs do not require carbon.
c. Autotrophs mainly break down organic compounds.
d. Autotrophs harvest energy from decomposing organisms
e. Autotrophs are consumers.
a
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A certain species of pine tree survives only in scattered locations at elevations above 2800 meters in the western United States. To understand why this tree grows only in these specific places, an ecologist should _____
A) conclude that lower elevations are limiting to the survival of this species B) study the anatomy and physiology of this species C) investigate the various biotic and abiotic factors that are unique to high altitude D) analyze the soils found in the vicinity of these trees, looking for unique chemicals that may support their growth E) collect data on temperature, wind, and precipitation at several of these locations for a year
Cell walls of most Archaea and bacteria contain peptidoglycan.
Answer the following statement true (T) or false (F)
Which of the following statements about heritability is true?
A) Broad-sense heritability defines the complete genetic basis of a trait. B) Heritability is fixed for a given trait. C) Traits shared by members of the same family do not necessarily have high heritability. D) Heritability is the measure of the proportion of an individual's phenotype that is due to genetics. E) If a population displays little variation in a given trait, then that trait has low heritability
If you wish to rid an experimental organism of the function of a gene, you can use RNAi. What would you inject into the organism?
A) co-suppressor with double-stranded (ds) DNA B) ssRNA complementary to cDNA C) ssRNA complementary to mRNA D) dsRNA homologous to the gene E) dsRNA including transposase