Answer: The acrosome of the sperm contains enzymes necessary for the penetration of the egg.
The acrosome is a cap present in the head of the sperm which contains all the enzymes required for penetration into the egg when fertilisation occurs. Capacitation process occurs to remove the glycoproteins found on the surface of the acrosome and this process takes place in the vagina. Without the process of capacitation the fertilisation of the egg by the sperm would not be possible.
15 degrees Celsius is colder than 20 degrees Celsius. It gets colder as the temperature decreases.
Answer:
The correct option is b. 0.453
Explanation:
To calculate the coefficient of coincidence, CC, we must use the next formula:
CC= observed double recombinant frequency/expected double recombinant frequency
<u>Note</u>:
• <em>Observed double recombinant frequency=total number of observed double recombinant individuals/total number of individuals
</em>
<em>• Expected double recombinant frequency: recombination frequency in region I x recombination frequency in region II.
</em>
CC= (7/1000)/0.16x0.08
CC= 0.007/0.0128
CC=0.5468
The coefficient of interference, I, is complementary with CC.
I = 1 - CC
I = 1 - 0.5468
I = 0.4531
Dodder is a parasitic plant which has A. HAUSTORIAL ROOTS for support and absoption of nutrients from the host plant.
Dodder can not live alone. It grows from a seed and sprout from the ground but if it does not find a host within 10 days, it will die.
When the Dodder finds its host, it twines itself in a counter-clockwise direction around the stem of its host. The Dodder stem has bumps called "haustoria". These bumps are tightly pressed against the stem of the host plant and said bumps will eventually push their way inside the hosts' stem to pull the nutrients it needs to survive to the detriment of the host plant.
Dodder plant may be parasitic but it does not kill its own host instead it causes the growth of the host to be stunted.