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What groups have a trochophore?

What groups have a trochophore?

Trochophore, also called trochosphere, small, translucent, free-swimming larva characteristic of marine annelids and most groups of mollusks. Trochophores are spherical or pear-shaped and are girdled by a ring of cilia (minute hairlike structures), the prototroch, that enables them to swim.

What phylum are trochophore larvae?

phylum annelida
They are triploblastic, bilaterally symmetrical and segmented Metazoa. Some of the annelids belong to the Lophotrochozoa lineage. Trochophore larva occurs in phylum annelida.

Do cnidarians have trochophore larvae?

These clades are upheld when RNA sequences are compared. Trochophore larvae are characterized by two bands of cilia around the body. The lophotrochozoans are triploblastic and possess an embryonic mesoderm sandwiched between the ectoderm and endoderm found in the diploblastic cnidarians.

Is a nematode a mollusk?

Nematodes are not so obviously related to annelids and molluscs, either in the structure of the animals themselves or in the form of their embryos.

Is porifera a trochophore?

Invertebrates- are animals that lack a backbone. They account for 95% of known animal species. Lophotrochozoan- have a lophophore (a crown of cilia that surrounds the mouth) or a trochophore (larvae that have cilia around their middle). Porifera- Sponges are basal animals that lack true tissues.

Which class of annelida has free larval stage?

A free-swimming immature form called the trochophore larva develops in the polychaete annelids and during the development of certain other invertebrate groups—mollusks, sipunculids, and lophophores.

What is the trochophore function?

A trochophore (/ˈtroʊkəˌfɔːr, ˈtrɒ-, -koʊ-/; also spelled trocophore) is a type of free-swimming planktonic marine larva with several bands of cilia. By moving their cilia rapidly, a water eddy is created. In this way they control the direction of their movement.

Are nematodes harmful to humans?

The nematodes are not dangerous for humans, animals and the plant itself. Nematodes are also used in organic farming to destroy pests without resorting to aggressive poisons. The big advantage: other insects such as bees are not affected by the useful earthlings.

How do I get rid of nematodes?

To kill nematodes in soil, heat small quantities of moist soil to 140°F in the oven or by solarization. Heating soil in the oven over a time period needed to bake a medium-sized potato placed in the center of the soil is sufficient to kill nematodes; however, this is only practical for small quantities of soil.

Do cephalopod mollusks have a trochophore stage?

Question: Do cephalopod mollusks have a trochophore stage? Yes No Depends. Some cephalopods have a trochophore stage, others do not. Select all the feature(s) that at least some representatives of the mollusk classes Polyplacophora, Gastropoda, Bivalvia, and Cephalopoda share with each other.

What is trochophore 11th?

Hint: The trochophore larva is plankton-like translucent, free-swimming, ciliated structure found in organisms living in marine water bodies, especially in the aquatic worms. It is also known as the Troposphere. The larvae usually survive by feeding on planktonic masses in the sea.

What happens in the life cycle of a nematode?

Life cycle. Nematodes are dioecious, with separate male and female genders. There are four stages of a nematodes life: egg stage , four larval or juvenile stages, and an adult stage. During each juvenile stage, a molt happens where the cuticle is shed, allowing the nematode to increase in size.

What kind of mollusk is a trochophore larva?

mollusk: Reproduction and life cycles. …prototrochus) and is called the trochophore larva. Trochophores are encountered in the development of many marine annelid species (phylum Annelida). In more advanced mollusks (such as in marine gastropods and bivalves), the trochophore larva develops into a veliger larva.

Which is the second stage of the trochophore?

Trochophore. In some mollusks (such as gastropods and bivalves), the trochophore develops into a second stage, the veliger ( q.v. ), before metamorphosing to adult form. Rotifers and the larvae (sometimes considered trochophores) of such invertebrates as phoronids and bryozoans are trochophore-like in appearance.

Can a nematode be identified by a compound microscope?

The common plant-parasitic nematode genera are fairly easy to identify to that level using a standard compound microscope. Identification of nematodes to the species level often requires detailed morphological analysis, growth of the nematode on different host plants, or DNA or isozyme analysis.