Cephalopoda
Explanation:
Cephalopods are commonly known as inkfishes.
But cephalopods are not at all fishes. They are molluscs.
They belong to Class Cephalopoda of phylum Mollusca.
Like other molluscs, these are also soft bodied, but have a series of tentacles that actually developed from theprimitive foot.
Cephalopods have a well developed nervous system and have large bulging eyes.
Examples of cephalopods are, octopus, giant squid etc.
Considering all the above characteristics, we can conclude that the predator stated in the question is most likely to belong to the clade cephalopoda.
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.
Two types of organelles that produce energy
