How do endolithic (living inside rock) microbes make a living in bedrock beneath soil? What kind of trophy do they engage in?
What will be an ideal response?
Endoliths (microbes that live inside of rock) live off of decay of uranium. Uranium-238 decay generates hydrogen radicals that combine to form H2 gas. H2 gas + CO2 provides an e- donor and a carbon source for methanogens and other endolithic lithotrophs. Because they use CO2 as their carbon source (to make methane), they are considered chemolithoautotrophs.
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Which biome occurs between the polar ice cap and northern boreal forests?
a. chaparral b. boreal forest c. desert d. grassland e. tundra
Answer the following statements true (T) or false (F)
1. If a woman in her late forties wants to have a baby and seeks medical advice, she would most likely be advised of the risks related to nondisjunction occurring and a higher rate of fetal chromosomal abnormality. 2. Identical twins result from one zygote splitting into two genetically identical embryos. 3. Without genetic diversity, a population might more easily fall victim to parasites and pathogens. 4. Caenorhabditis elegans is a hermaphrodite, which means it only undergoes sexual reproduction. 5. In animals, each gamete arises from a diploid cell containing two sets of homologous chromosomes.
What is needed in the following reaction: ____ + Pi + energy ? ADP
a. ATP b. H2O c. AMP d. cAMP e. glucose-P
How is sex determined in most ants and bees?
A) by the X-Y system B) by the Z-W system C) by the number of chromosomes D) by the size of the sex chromosome