Answer:
many
pollution by dumping chemical that are harmful to the animals
littering by plastic
accidentally introducing invasive species
over fishing
 
it lowers the biodiversity of the aquatic ecosystems living there
Explanation:
 
        
             
        
        
        
Since the somatic cell count of a roundworm is four, the gamete count would be two. gamete count is half of somatic.
        
             
        
        
        
Answer:
The correct answer is option B. false.
Explanation:
The seminal vesicles are the site of production of the seminal fluid which makes 60 % of the total seminal vesicles. The seminal vesicles do not store the sperm.
The primary storage site of the sperm in seminiferous tubules and tubular storage sites for the sperm is  epididymis.
Thus, the correct answer is option B. false.
 
        
             
        
        
        
Answer: In a predator prey relationship, the predator kills and eats the prey. In a parasite/ host relationship, the parisite is feeding off the host, without killing it.  If the host dies, the parasite will as well.
Explanation:
I hope that makes sense XD good luck