ZOO201 Current Questions by Ch Ismail

\ Current paper ZOO201

Efforts by Ch Ismail

Q1. Name of animal of diplopoda?

Members of the class diplopods are Millipedes

Most millipedes are slow-moving detritivores, eating decaying leaves and other dead plant matter

Q2. Trepang ?

The body wall of sea cucumbers, when boiled and dried, is known as trepang in Asian countries.

3. Starfish stomach:

The mouth opens to a short esophagus and then to a large stomach that fills most of the coelom of the central disk. The stomach is divided into two regions. •The larger, oral stomach, sometimes called the cardiac stomach, receives ingested food. •It joins the smaller, aboral stomach, sometimes called the pyloric stomach.

Q4. Complete metamorphosis?

Complete metamorphosis is the type of insect development that includes egg, larva, pupal, and adult stages, which differ greatly in morphology. The lifecycle of butterflies, ants, fleas, bees, beetles, moths, and wasps are examples of the complete metamorphosis.

5. Ventilating process in insects? long

Most insects have ventilating mechanisms that move air into and out of the tracheal system.

• Insects do not breathe through their mouths as we do.
• The do not have lungs and their blood, which is a watery, yellowish liquid, does not carry oxygen and carbon dioxide around their bodies.
• Insects have a system of tubes, called tracheae, instead of lungs.
• These tracheae penetrate right through the insect's body.
• Air enters the tracheae by pores called spiracles.
• These spiracles are found on each side of the insect's abdomen. Each segment of the abdomen has a pair of spiracles.

•As oxygen diffuses from the tracheae to the body tissues, and is not replaced by carbon dioxide, a vacuum is created that draws more air into the spiracles. This process is called passive suction.

6. Skeleton of sea urchin? Imp.long

Sea urchins are rounded, and their oral end is oriented toward the substrate. •Their skeleton, called a test, consists of 10 closely fitting plates that arch between oral and aboral ends. Five rows of ambulacral plates have openings for tube feet, and alternate with five inter ambulacral plates, which have tubercles for the articulation of spines. The base of each spine is a concave socket, and muscles at its base move the spine. •Spines are often sharp and sometimes hollow, and they may contain venom dangerous to swimmers.

7. garden centipedes.

Members of the class Symphyla (sim-filah) (Gr. sym, same phyllos, leaf) are small arthropods (2 to 10 mm in length) that occupy soil and leaf mold, superficially resemble centipedes, and are often called garden centipedes.

Q8. Phylum of sea urchin ?

Sea urchin is invertebrates and belong to phylum Echinoderm.

Q9. Circulatory system?

The circulatory system of insects is similar to that described for other arthropods, although the blood vessels are less well developed. Insects, like all other arthropods, have an open circulatory system which differs in both structure and function from the closed circulatory system found in humans and other vertebrates. In a closed system, blood is always contained within vessels (arteries, veins, capillaries, or the heart itself).

10. Insects pollination? long

Insects are responsible for the pollination of approximately 65% of all plant species. •Insects and flowering plants have co evolutionary relationships that directly benefit humans. The annual value of insect-pollinated crops is estimated at $19 billion per year in the United States. Insect pollination is crucial to most gardens and is as simple as insects like bees, butterflies and wasps flying from flower to flower in order to collect nectar. •In the process, pollen collects on their bodies and rubs off on other flowers that they visit.

Q11. Juvenile hormone?

hormones.

Q12. Sea lily and star?

PHYSICAL CHARACTERISTICS:

Sea lilies have a stalk below the crown and look like flowers. Feather stars have a cluster of tentacles below the crown and look like ferns.

Feather star are white, purple, brown, green. Or violet. Sea lily are white.

HABITAT:

Most sea lilies live in deep water and most feather star live on coral reefs.

DIET:

Both are planktonic

13. Locomotion in Sea Cucumber? Long repeated

Sea cucumbers are mostly sluggish burrowers and creepers, although some swim by undulating their bodies from side to side.