Answer:
The correct answer is option c) "It is necessary to have a completely functioning pentose phosphate pathway for a tissue to synthesize ribose phosphates".
Explanation:
While the pentose phosphate pathway is the most common way at which a tissue synthesize ribose phosphate, it is false to affirm that it is necessary for ribose phosphate synthesis. Tissues have alternatives to the pentose phosphate pathway to synthesize ribose phosphate. For instance, the nucleotide salvage or the salvage pathway allows tissues to synthesize ribose phosphate from intermediates in the degradative pathway for nucleotides.
The Muller's ratchet in evolutionary genetics refers to a procedure by which gathering of harmful mutations takes place in an irreversible way by the genomes of an asexual population. Muller suggested this process as one of the cause that why sexual reproduction can be considered over to asexual reproduction.
The main influence of Muller's ratchet is the gathering of somewhat deleterious mutations. Such gathering of mutation can at certain occasions result in eventual extinction.
This takes place if population size is finite, recombination is absent, slightly deleterious rates of mutations are high, almost no back mutations takes place, and purifying selection is very weak to eradicate all the novel deleterious mutations.
Answer:
Geologists do not use carbon-based radiometric dating to determine the age of rocks. Carbon dating only works for objects that are younger than about 50,000 years, and most rocks of interest are older than that
Explanation:
Answer:
(1) to investigate and describe the diversity of the living world; (2) to understand the effects of human activities on species, communities, and ecosystems ; and (3) to develop practical interdisciplinary approaches to protecting and restoring biological diversity.