Answer:
Explanation:
Normally, when the atmosphere changes. Then the temperature either to reduces or increase. The act of the temperature going up and down then creates the condition that makes us have night and the daytime.
This also causes the change in pressure that gets detected by a barometer.
When the temperature is high, it can form snow. On the other hand, when it's low, it results in rainfall.
Answer:
The correct answer is case control study.
Explanation:
A study in which a comparison is made between the patients carrying the disease with the patients not carrying the disease is known as the case-control study. In the mentioned study, the one carrying the disease is termed as cases, and the one that does not possess the disease is termed as controls.
This form of study is generally done to predict the association between the disease and the risk factor. In case-control studies, only observation is done as no attempt is made to change the course of the condition. The prime objective of the study is to predict the exposure of the risk elements for the individuals present in two groups, that is, controls and cases. This form of study is also called case-referent studies or retrospective studies.
Answer:
Artificial selection is non-random whereas natural selection, and sexual selection are random selection.
Explanation:
Artificial selection is considered non-random whereas natural selection, and sexual selection are considered as random selection because in Artificial selection, humans select the mating animals in order to acquire the desired characteristics and features in the offspring while on the other hand, natural selection, and sexual selection are happen randomly without the intervention of humans, it occurs naturally so we can conclude that artificial selection is non-random whereas natural selection, and sexual selection are random selection.
The correct answer is: A checkpoint will be activated if the spindle does not attach to a kinetochore.
Prokaryotes, do not undergo mitosis (like eukaryotes) and therefore have no need for a mitotic spindle. Prokaryotes also don’ t have checkpoints foor the regulation of cell division.
Normal eukaryotic cells (unlike cancer cells), move through the cell cycle in a regulated way in order to make sure that cells don't divide under conditions that are unfavorable for them. Information about their own internal state (nutrients, signal molecules, DNA integrity) is signal to go or not to go through the cell division. Because of that there are few checkpoints in the cell cycle at which the cell examines the signals and makes a “decision”. The major checkpoints are:
• The G1- the first point at which it must choose, once it passes the G1 checkpoint the cell enters S phase
• The G2-the cell checks DNA integrity and checks if replication is done well.
• The spindle checkpoint-at the transition from metaphase to anaphase.
