Answer:
A. The lytic lifecycle allows viruses to reproduce more quickly but also kills the host and forces the virus to find a new host cell.
Explanation:
The lytic lifestyle of the viruses (e.g. bacteriophage) can be described through the next steps:
- attachment and injection into the host cell (e.g.bacterial cell)
- synthesis of the early virus proteins which break down host's DNA
- virus uses host's machinery (for the replication, transcription and translation) to produce the rest of its proteins and to form new virus particles.
- host cell burst and many new virus particles are released.
During the lysogenic cycle, virus does not kill the host. It integrated its DNA into host's genome and stays dormant until conditions are optimal for reproduction.
Secondary succession happens when the ecosystem started reviving itself after it has been destroyed naturally or man-made for a period of time. The factors that contributes to the cause of secondary succession are the climate, physiography and the biotic factor also.
Answer:
The two common steam-sterilizing temperatures are 121°C (250°F) and 132°C (270°F). These temperatures (and other high temperatures)830 must be maintained for a minimal time to kill microorganisms.
The hominid that is described is <em>Australopithecus africanus</em>.
<em>Australopithecus africanus</em> is one of the extinct hominids. It lived approximately from between 3.2 to 2.1 million years ago, in the late Pliocene and early Pleistocene. It is a species that lived in Africa, but its total range is not well known as there is only four fossils from it found, all in the same region, in the southern part of Africa.
The <em>Australopithecus africanus</em> is thought to be the ancestor of the later <em>Homo habilis</em>, and it is also considered to be a direct ancestor of the modern <em>Homo</em> <em>sapiens</em>, though that is still debatable.