Answer:
Groups 4 to 7 are most likely to be undergoing the mitotic phase of the cell cycle.
Explanation:
Since the four proteins used p16, p18, p21, and p27 are inhibitors of cyclin-dependent kinases (CDK), their absence indicates that the cell is undergoing mitosis - the cell cycle is regulated by CDKs. In the absence of these inhibitors, the cell cycle moves on forward. Because the bar for DNA replication is longer in the case for groups 4 to 7, it is indicative of the fact that these cells have gone through the mitotic phase.
Hope that answers the question, have a great day!
The former means those most fit, those with the best set of skills and features for the given environment, will live to pass on the said features in the offspring (with ants, for example, being incredibly fit and adaptable creatures). The latter suggests there is an objective way to measure the "meaningfulness" of each species and having only those most meaningful survive. But this differs from species to species - for a house cat, the great white shark is utterly meaningless.
Also, the meaningful animal has no actual advantage over another to help him survive, whereas fittness is exactly that - it is the ability to survive, ability to pass on your genes.
While I understand it may seem so in the case of domestic animals that the most meaningful to the human are those allowed to reproduce, it is actually the same law: those most adapted for human purpose (which, of course, in the given case means the most meaningful) ARE the fittest here in the human-controlled environment.
Answer:
1. obtain food from non-living organic material (saprophyte)
2. mutually positive arrangement between species (symbiosis)
3. response to a chemical
(chemotaxis)
4. response to light (phototaxis)
5. member of phylum Foraminifera (radiolarian)
6. organism's response to a stimulus (taxis)
7. cell with membrane-bound structures (eukaryote)
8. organism in which a parasite is growing (host)
9. sexual reproduction in some protozoans (conjugation)
Explanation:
The items duely matched to its meaning above.
All the matches corresponds with each other, with small explaination of what each does.
