Prokaryotes were divided into two domains, Bacteria and Archaea, based on RNA sequence differences. Genetic analysis revealed these two groups have fundamental differences at a molecular level. Despite both being prokaryotes, Archaea were found to be more similar to eukaryotes than to Bacteria.
Scientists divided prokaryotes into two major domains, Bacteria and Archaea, based on differences in their RNA sequences. It was shown through genetic analysis that there are fundamental differences between these two groups at a molecular level, especially in the structure of their ribosomal RNA (rRNA).
While both groups are prokaryotes, without a nucleus and other complex cell structures, Archaea were found to be more similar to Eukarya (the domain that includes all organisms with eukaryotic cells, including humans) than to Bacteria. As a result, these two prokaryotic groups were separated into individual domains, reflecting their distinctive evolutionary paths.
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Prokaryotes were divided into the two domains, Bacteria and Archaea, based on their cell membrane structure and differences in the ribosomal RNA. This division signifies the remarkable diversity within prokaryotic life, attesting to their adaptability in diverse environmental conditions.
Prokaryotes were originally classified into a single group, but with advancements in genetic analyses, it was observed that there were considerable genetic differences among them. This led to the division of prokaryotes into two domains: Bacteria and Archaea. Using DNA sequencing and studying of small-subunit ribosomal RNA, researchers like Carl Woese were able to identify major differences in the structure of cell membranes and in rRNA that validated the separation into these two domains.
Despite being prokaryotic and lacking a nucleus or membrane-bound organelles, there were significant differences between Bacteria and Archaea. These differences were as fundamental as the ones which separate prokaryotes from eukaryotes, leading to the introduction of the three domain system comprising Bacteria, Archaea, and Eukarya.
Prokaryotes are recognized as the first inhabitants of Earth, present in diverse and often harsh environments ranging from boiling hot springs to frozen terrains in Antarctica. Despite the harsh conditions, they exhibit great diversity in form and function, underscoring the immense adaptability of prokaryotic life.
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b. False
Bacteria: Both processes provide the Bacteria with new genes that might provide new ways of dealing with environmental changes.
Transformation and transduction are crucial processes in the Kingdom Bacteria and to some extent in the Kingdom Archaea. They both contribute to genetic variation in bacterial populations, aiding in their adaptability.
The processes of transformation and transduction are vital in the Kingdom Bacteria (and also play roles in the Kingdom Archaea). Transformation involves a bacterium taking in DNA from its environment, allowing the bacterium to acquire new traits—this can potentially include pathogenic traits.
Transduction, meanwhile, is a process whereby a virus (a bacteriophage) transfers DNA from one bacterium to another, leading to genetic recombination. Both processes aid in increasing genetic variability in bacterial populations, which can help these organisms adapt to changing environmental conditions.
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2. Endotherms have higher energetic demands compared to ectotherms.
3. Endotherms spend more energy on internal temperature regulation compared to ectotherms.
4. Endothermy is more common among animal phyla than ectothermy.
5. At the cellular level, endotherms cells always produce more ATP and more heat.
Answer:
3. Endotherms spend more energy on internal temperature regulation compared to ectotherms.
Explanation:
Ectotherms, are considered as cold-blooded animals (reptiles and amphibians), and are organisms that don't have the ability to generate enough heat to keep themselves warm. Endotherms, in contrast, do possess the ability to generate their own body heat.
Endotherms also called warm blooded animals (mammals) have the ability to regulate their body temperature by themselves. If the endotherms are in a cold place their body increases the metabolism and generates more heat. This will compensate for the cold outside.
The correct answer is option B, Gorillas
Tiger resembles gorillas as these two animal species are high order vertebrates and live in the same habitat i.e on land. Most of their physical and biological features are same or their functionality concepts are same. While fish are primates of lower order and live in water , thus they posses many distinctive feature which are absent in tigers. Insects are Arthropods and are invertebrates.
a. 3
b. 4
c. 5
d. 6