Answer: The correct answer is option a.
Explanation:
Prezygotic isolation is a mechanism by which mating and fertilization is prevented. Thus, it prevents the formation of a zygote.
It can be achieved by various reasons such as temporal differences (difference in mating seasons), habitat isolation, behavioural differences (different mating rituals such as different dance patterns, voice calls, et cetera), mechanical isolation, et cetera.
Thus, different breeding calls prevent the species to interbreed with each which ultimately prevent the formation of zygote formation.
Hence, it is a type of prezygotic isolation.
Meiosis is a process of cell division that involves the production of gametes. The process takes place in two stages meiosis i and meiosis ii resulting to four haploid daughter cells. Non-disjuction is a condition that results from the failure of separation of sister chromatids or the homologous chromosomes during cell division. This includes failure of sister chromatids to separate during mitosis or meiosis ii and failure of homologous chromososmes to separate during meiosis i. If it occurs during meiosis ii, then the result is a germline mutation in either the oocyte or the spermatocyte.
Ok, a few things here:
This is an egg drop experiment, so I'm assuming you are testing out different ways of protecting the egg.
The independent variable is what you want to change: This would be the type of protection you have on the egg
The dependent variable is what would be effected by the changes in the independent variable: which would be something like the integrity of the egg after it hits the ground. You'd have to measure that somehow.
There are two types of controlled variables: <em>Internal and External.</em>
Internal variables are within the scope of the experiment and can be controlled, whereas external variables are outside the scope of the experiment and we have no control over them.
Internal:
- Height of the drop
- Type of egg
- Person dropping
- How the egg is dropped
- Surface being dropped on to
External:
- The person designated to drop the egg is sick
- You run out of eggs to drop
- Somebody loses all the planning for the experiment
- The weather forces you to do the experiment inside versus outside
- The wind blows your egg off course, leading to it hitting the ground at an angle
So, the way your teacher "chucks" the eggs off the roof should be a controlled internal variable. The action should be done as consistently as possible to avoid an uncontrolled variable.
Easily distracted, cannot wait to take turns, excessive fidgeting, excessive climbing and running. Hope this helps, good luck!
Answer:
It weakened the idea of spontaneous generation
Explanation:
I had this question on my test last week
