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How many longitudinal nerves does a planarian have?
A planarian has two longitudinal nerve cords that run along its body length. These nerve cords are connected by transverse nerves, forming a ladder-like nervous system.
What is a planarian?
The definition of a Planarian is "any of various free-swimming, mostly freshwater flatworms of the class Turbellaria, having an undulating or sluglike motion: popular in laboratory studies for the ability to regenerate lost parts." This means that it can, if any body parts are chopped off, regrow them. In junior high we sliced it's head down the middle and it regrew two heads in a matter of weeks. Cool, but really disgusting. It is a worm-like animal. The definition of animal is "any such living thing other than a human being." So in conclusion, according to the definition of animal, a Planarian is an animal, but a very strange one.
What kind of asexual reproduction does a earthworm use?
Planaria are hermaphrodites, possessing both testes and ovaries. Thus, they can reproduce asexually with their own gametes or sexually with another planarian. In asexual reproduction, the planarian detaches its tail end and each half regrows the lost parts by regeneration. However several problems can occur with this, so this does not happen very often. Instead, in sexual reproduction, each planarian transports its excretion to the other planarian, giving and receiving sperm. Eggs develop inside the body and are shed in capsules. Weeks later, the eggs hatch and grow into adults. Sexual reproduction is desirable because it enhances the survival of the species by increasing the level of genetic diversity.
What animals only eat flowers?
Carnivores will not eat flowers or plants. Carnivores are organisms that only eat meat. For example, a hawk is a carnivore. Hawks eat mice. In conclusion, a hawk does not eat plants or flowers.
Can carnivores eat plants, or are they strictly meat-eaters?
Carnivores are animals that primarily eat meat, but some carnivores may occasionally eat plants as well.
How does a planarian capture its food?
The planarian feeds on crustaceans, larvae, and small worms. To eat, it extends a long, tubular pharynx from its mouth. Through this tube it secretes digestive juice onto its prey, then sucks in bits of partly-digested food.
When was Lake Pedder planarian created?
Lake Pedder planarian was created in 1974.
Is a planarian acoelomate pseudocoelomate or educoelomate?
A Planarian is an acoelomate, meaning they do not have a body cavity at all.
How long can your planarian survive without food?
A planarian can live without food for about a week.
What are the two big dots on a planarian's head?
The two big dots on a planarian's head are its eyespots, which detect light and help the planarian navigate its environment. They are simple light-sensitive structures that allow the planarian to differentiate between light and dark. They also help the planarian avoid predators and find food.
Is a Planarian sessile?
No, a planarian is an example of a flatworm.
Does a planarian have a backbone?
No.
Does planarian have backbone?
No.
What feeding relationship is a planarian a part of?
A planarian is a flatworm and is parasitic which means that it feeds off living things.
Where is the pharynx located on a planarian?
The pharynx in a planarian is located on the ventral side of the body, towards the front end. It is a muscular tube-like structure that extends out of the body to help the planarian feed on prey.
Phylum name for planarian?
Their Superphylum is Platyzoa and their Phylum is Platyhelminthes.
Planarian has a bilateral symmetry Explain?
name one anatomical feature (other than symmetry) that distinguishes a planarian from a hydra.
