The cellular division that changes the chromosome ploidy number from 2n to 1n occurs during the Metaphase of Meiosis II
 
        
             
        
        
        
Answer:
B or Letter B
Explanation:
Ovules are found in the ovary. The ovary can be described as the oval structure at the base of the flower.
The flower is found in the Angiosperms, that is, the flowering plants. And it is known to be the part of the plant that allow sexual reproduction to occur. The flower usually contains the reproductive parts, which include 
* Androecium... This is known to be the male reproductive part of a flower, and it comprises the Anthar { this encloses the pollen grains}, and the filament.
* Gymnoecium... This is the female part of the flower and comprises of the stima, style and the ovary { encloses the ovules}.
In conclusion, the pollen grains will fuse with the ovules,[ this is known as fertilization], to form a fruit. The pollen grains can be compared to the spermatozoa in Man, while the ovules are like eggs in the woman.
 
        
             
        
        
        
<h3>Three 
tools Oceanographers use</h3>
<h3>
Functions of the 
tools.</h3>
- Thermometer helps to measure the temperature of the ocean. Temperature  usually varies according to the season.
- Radar helps to measure ocean currents and and it works under any type of weather condition.
- Sonar is an instrument used to accurately measure the ocean depths through the use of sound waves.
Read more about Oceanographers here brainly.com/question/977380
 
        
        
        
Answer:
B
Explanation:
Specificity constant-The ratio of Kcat/Km is called as specificity constant.
  Kcat-Turn over number 
  Km-Michaelis constant 
Specifictiy constant is the measure of enzyme efficiency .
 
        
             
        
        
        
Answer:
<em><u>This is the only phylum of the animal subkingdom Parazoa and represents the least evolutionarily advanced group of the animal kingdom. ... Sponges are the only animals that lack tissues with mass of cell embedded in gelatinous matrix.</u></em>