Answer: All the above options are correct about the characteristics of Lumbriculus variegatus.
Explanation:
Lumbriculus variegatus also called the black worm belongs to the phylum Annelida and is used by biologists to illustrate:
-blood vessel pulsations,
-swimming reflex,
-peristaltic crawling behavior,
-giant nerve fiber action potentials.
These studies where carried out on them due to the characteristics they possess. These includes:
-its blood circulates in a closed circulatory system
-Freshwater worm found throughout North America and Europe
-Prefers the shallow habitats found at the edges of ponds, lakes, or marshes
-Feeds on decaying vegetation and microorganisms.
Here is the order:
Sun, grass, grasshopper, frog, snake, and hawk.
I hope this helps!
~cupcake
Answer:
If you ask me then I would say, Is just one shark going? Why are you doing it?
Hope this helps
Answer: The fertilized ovum, now called a zygote, is ready for the first mitotic cell division.
