Answer:
Beneficial mutations events can generate resistance to drugs
Explanation:
Bacteria can develop antibiotic resistance through mutations, as well as horizontal transference events, that allow them to reduce/eliminate the effectiveness of drugs used to treat infections. For example, penicillin-resistant strains have been identified in <em>Staphylococcus aureus</em> and <em>Streptococcus pneumoniae</em>. In general, mutations have a negative impact on the fitness of the organism; however, there are cases where mutations increase the fitness of the individual. In consequence, antibiotic resistance may occur by natural selection, where antibiotic-resistant bacteria that exhibit beneficial mutations are selected to survive and perpetuate their genetic material.
Thé indépendant variable is the park size and the dependent variable is the species richness. This is because the larger the park, the more species there can be, therefore the amount of species would depend on the size of the park
<h2>Expiration </h2>
Explanation:
Inspiration and expiration occur due to the expansion and contraction of the thoracic cavity, respectively
- Inspiration is the process that causes air to enter the lungs whereas expiration is the process that causes air to leave the lungs
- Expiration is typically a passive process that happens from the relaxation of the diaphragm muscle (that contracted during inspiration)
- Exhalation begins when inhalation ends
- Pleural cavity’s increased negative pressure leads to air uptake during inhalation, the pleural cavity will contract during the exhalation (due to relaxation of the diaphragm),which exerts pressure on the lungs and causes the pressure inside the cavity to be less negative
- An increase in pressure leads to a decrease in volume inside the lung, and air is pushed out into the airways as the lung returns to its smaller size
- The pleural cavity is so important to breathing because it’s pressure changes the volume of the lungs, and it provides a friction-less space for the lung to expand and contract against during breathing
Answer:
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Answer:
1. Genus
2. Common ancestor
3. Synapomorphies
4. The system is called binomial nomenclature, and the specific categories used are genus and species.
5. The scientist could use a phylogenetic tree to help visualize the evolutionary relationship.
6. One clade is differentiated from another clade by a branching point within the phylogenetic tree that's defined by some character or characters.
7. Since cladistics depict an evolutionary relationship between organisms, the traits that are studied and categorized are homologous traits.
8. DNA sequencing is the technological development that allowed scientists to gain a more complete understanding of the relationships between species.
Explanation:
