Answer:
In vitro fertilization (IVF)
Explanation:
In vitro fertilization is conducted when infertility is perceived in sexual partners trying to have a baby. It is the process whereby matured ova/eggs are removed from the female's reproductive system and is fertilized externally in a laboratory (usually in a glassware) using a male's sperm cell. It can be thought of as a procedure where the normal fertilization process that occurs in a female's reproductive tract (fallopian tube) is carried out outside the body, specifically in a laboratory.
In order for this procedure to be employed, the male and female must be able to produce their respective gametes. The female's ovary is usually stimulated by fertility drugs in order to yield numerous eggs, which are then extracted from her ovary and fertilized by a sperm externally (in a laboratory). The resulting fertilized egg called embryo is placed back into the female's womb to carry it as a normal pregnancy.
Answer:
d. to produce the soil
Explanation:
pioneer species produce soil so other species less hardy can grow
It contracts and relaxes!
Hope this helped u!!
<em>A control is that group in an experiment that does not receive any treatment and is used for comparison with the test result.</em>
<u>Answer:</u> <em>A) a control</em>
<u>Explanation:</u>
In the experiment mentioned, the control is missing because the test group as mentioned are the plant set that receives the treatment that is the different concentration of nitrate and phosphate.
The effect of these nutrients on growth will be observed and evaluated. The time period of the experiment is one month which might exceed.
Answer:
Gram positive bacteria will be lysed whereas gram negative bacteria will be unaffected.
Explanation:
- Lysozyme treatment degrades bacterial cell wall. It destroys the peptidoglycan cell wall by hydrolyzing the glycosidic bond between NAM and NAG sugar residues present in the cell wall.
- Gram positive bacteria has a thick peptidoglycan cell wall with only a thin outer layer of techoic acid. So when exposed to lysozyme, the peptidoglycan layer disintegrates and forms debris.
- Gram negative bacteria has a thin peptidoglycan cell wall and a tough outer membrane. The outer membrane does not allow the lysozyme to come in contact with the cell wall keeping it intact.
- Hence, Gram positive bacteria will be lysed whereas gram negative bacteria will be unaffected by lysozyme treatment.
