After the Cretaceous–Paleogene extinction event wiped out the non-avian dinosaurs (birds being the only surviving dinosaurs) and several mammalian groups, placental and marsupial mammals diversified into many new forms and ecological niches throughout the Paleogene and Neogene, by the end of which all modern orders had appeared.
Answer:
A mutation can occur when mistakes are made during DNA replication.
Explanation:
<span>Endospore is a protective structure that can
able to survive for long periods of time in soil and water in which they commonly
found. They are tough, dormant and non-reproductive structure which can
withstand heat, dryness, and toxic chemicals that would kill most other
bacteria produced by a small number of bacteria like the bacterium Bacillus
thuringiensis from the Firmicute family. To ensure the survival of a bacterium
through periods of environmental stress is the primary function of most
endospores. They are also resilient to gamma and ultraviolet radiation, chemical
disinfectants, desiccation, starvation, lysozyme and temperature and can survive any environmental assaults.</span>
Answer:
B. p will neither increase nor decrease; it will remain more or less constant under the conditions described
Explanation:
When a population is in Hardy-Weinberg equilibrium, it is not evolving and allele frequencies are not going to change across generations. Conditions for a population to be in Hardy-Weinberg equilibrium are :
- Infinite population size
- Random mating
- No selection
- No mutation
- No gene flow
Since the moth population in question shows above mentioned characteristics, it is in Hardy-Weinberg equilibrium. Frequency of none of the alleles are going to change.
Hence, p will neither increase nor decrease; it will remain more or less constant under the conditions described.
