Answer:
HIV (human immunodeficiency virus) causes AIDS (Autoimmune deficiency syndrome) and reduces the ability of body to fight infection.
HIV was first found in 1959 in a man from Democratic Republic of the Congo and then announced as a world pandemic by WHO.
Approximately 37.9 million people were infected with HIV globally in 2018 but the pandemic statistics vary around the world. Sub-Saharan Africa was most infected region from HIV in 2018 where 61% population was infected from HIV/AIDS. In South & South-East Asia, about 12% of all people infected with HIV in 2010.
Now WHO announced HIV as 'global epidemic".
Answer:
Option (D).
Explanation:
Recombination frequency nay be defined as the the frequency of crossover of a single chromosome during meiosis. The maxiumum recombination frequency is 50%.
Genes that has recombination frequency nearly equal to 50% are considered as unlinked genes. Unlinked genes cannot undergo the recombination process and may have equal chances to inherit together or can inherit separately in the next generation.
Thus, the correct answer is option (D).
This study lacks generalizability.
Generalizability is an academic term and describes the process of extending research findings and observations from a study on a sample population to a larger and more diverse population. The larger the sample population, the easier will be to generalize the results to the wider population. In this example, Dr Kirch used a sampling technique called convenience sampling, which involves the selection of the most available and proximate subjects. However, there is sampling bias since the sampling population is not representative of the entire population and therefore the study can not speak for the entire population.
Answer:
c. False
This statement is incorrect because the DNA of bacteria is circular without histones.
Explanation:
a. True
Some archaea have very specific lipids in their membrane. Differently of the bacterias that have usual lipids in their membranes.
b. True
Archaebacteria do not have peptidoglycans in their cell wall
d. True
Methanogenic archaeobacteria are those that use carbon dioxide and hydrogen to produce methane. They are found in the digestive system of ruminants, sewers and swamps.
