Answer:
True
Explanation:
Hello!
In the human body, meiosis is the process by which specialized cells divide to form gametes (ovum in women and sperm in men).
Through the meiosis process, four haploid cells are obtained from a diploid cell. Haploid cells are those that have only one set of chromosomes.
In women, only one of the four haploid cells formed keeps all the organelles of the stem cell acquiring a large size (ovum).
In fertilization, a haploid sperm fertilizes a haploid egg giving rise to the zygote (diploid) that will give rise to a new aoganism.
When meiosis is not completed correctly the gamete may contain a duplicate (2 copies) of one or more chromosomes, in this case fertilization normally occurs but may give rise to:
-An unviable zygote.
-A viable zygote with a genetic disease due to a trisomy of one of its chromosomes (Dawn syndrome is an example with the trisomy of chromosome XXI).
Successes with your homework!
Answer:
Enzymes are proteins that bind to a molecule, to modify it and lower the energy required to make it react. ( In other words , enzymes are biological catalysts.
Catalysts lower the activation energy for reactions.
In simple terms , The lower the activation energy for a reaction, the faster the rate. )
The activation energy is the energy needed to start a reaction.
Explanation:
Thus enzymes speed up reactions by lowering activation energy.
Answer:
Succulents
Explanation:
They have a thick waxy cuticle so that water vapour does not escape easily
Some have thornes so they are not eaten by animals
There roots are very wide and shallow so that they can absorb water from the surface quickly after it rains
Their stomata open at night so that too much water vapour cannot diffuse into the air
Answer:
2: Liquid
Explanation:
Liquid has no shape (think of pouring water from a bowl to a cube, it doesn't keep the same shape) but has the same volume (from bowl to cube is still the same volume)
Hope this helps, have a nice day :))
There are some people disagreeing with me, so here are the others:
<em>(which is totally okay, just wanted to clear it up!)</em>
Solid: Has a definite shape and a definite volume (<em>a cube will stay a cube</em>)
Liquid: Has no shape, but definite volume (<em>will change shapes but has same volume</em>) <u>(answer)</u>
Gas: No shape, no volume (<em>will change shapes, but also does not have a set volume</em>)
Plasma: No shape, no volume (<em>ionized gas</em>)
Changes in temperature, salt concentration, ionic concentration, of pH levels
