The sun! you can remember this by Helio=sun and centric=centre
Answer:
It is an example of frequency-dependent selection. Due to several cheaters in the population, the fruiting body's stalk is not made properly. So, all individuals have lesser fitness.
Explanation:
Natural selection:
The population contains both superior as well as an inferior organism where natural resources are limiting so it will cause competition between organisms. As a result of competition, it will select superiors, and inferiors are deleted and they are given reproductive advantages. Due to this reproductive advantage new population emerges. It is more suitable for the environment.
Natural selection divides into three parts that are directional, disruptive, and stabilizing selection.
The given question is the example of frequency-dependent selection. Due to several cheaters in the population, the fruiting body's stalk is not made properly. So, all individuals have lesser fitness. Directional selection will not lead to fixation of cheater genotype. This is because cheating can be controlled through high relatedness in social groups, resulting from kin discrimination.
It is controlled through positive pleiotropy, where the cooperation gene has an additional vital function. Cheating will be controlled if stalk vs. spore is a result of environmental, not genetic factors. An example, spore fate can be a result of the position in the mitotic cell cycle.
Answer:
The organism will be placed under domain Eukarya
Explanation:
- Eukarya includes eukaryotic organisms like plants and animals.
- The organism contain nucleus and also membrane bound organelle like ER,Golgi body,Cytoplasm,lysosome, Chloroplast etc.
- Eukaryotes are multi cellular organism.
- The plants produce oxygen with the help of carbon dioxide,water and sun light.Thus they are called as photo autotrophs or producers.
- They are called multi cellular organism as the cell form different tissues.
- The domain eukaryotes are monophyletic which make up 3 domain.
Bacteria ,archaea,fungi are unicellular organism and they are unable to produce oxygen except some green blue algae and thus they are not place in domain Eukarya.
Answer:
A. Molecular changes such as extracellular signals on extracellular ligands can result in quick changes in cell behaviour. One example is insulin. Upon insulin binding on the receptor on the cell membrane, the cell release GLUT4 transporters (for muscle cells) to increase uptake of glucose.
B. Slow changes in cell behaviour can be observed for other lipophilic hormones or intracellular receptors such as glucocoortoid or estrogen which reacts with receptors in the cells.
C. Insulin is required to maintain a constant blood glucose level and hence levels of insulin has to be mediated in correspondence to the blood glucose levels. Fast acting signalling is thus required for homeostasis of blood glucose levels. Where for such lipophilic hormones such as steriods, glucocortoid, these hormones tend to have a longer lasting effect and hence results in a slow change.
I believe the answer would be Ecology which is the study of organisms and their relations
