ZOO201 Current Objective and Subjective 2021

ZOO201

Current Objective and Subjective Questions

2021

Objective Part

❖ The pheromones that are used to warn other individuals of danger are Alarm

pheromones

❖ In insects that display ametabolous metamorphosis, the primary difference between adults and larva are body size and sexual maturity ❖ In social insects reproductive females are referred as Queen ❖ Paurometabolous metamorphosis, immature are called Nymphs ❖ Water vascular system in echinoderms is also called Aquiferous system. ❖ Which of the following shows paurometabolous metamorphosis. a) Grasshoppers b) Silverfish c) Butterflies d) Honeybees ➢ Ecdysteroids are often called as molting hormones ➢ A tube feet often has a suction cup at its distal end. ➢ The echinoderms skeletal consists of series of calcium carbonate plates called ossicles. ➢ Which organ is involved in gaseous exchange in star fish? Dermal branchiae ➢ Immature stage in hemimetabolous metamorphosis? Nymph ➢ Which of the following shows ametabolous metamorphosis?

a) Silverfish

b) Butterfly c) Moth d) Cockroach ➢ In asteroids the larger, oral stomach, sometimes called the cardiac stomach. ➢ Each kind of individual in an insect colony is called a caste. ➢ Which of the following are exclusively marine animals? a) Molluscans b) Echinoderms c) cnidarian d) fishes ➢ Star fish make up class asteroidae. ➢ Larva of sea star is known as bipinnaria larva. ➢ Complete metamorphosis consists of 4 stages. ➢ Member of class Ophiuroidea among following is? a. Sea star b. Sea cucumber c. Brittle star d. Sea urchin ➢ An insect that transmit a disease is called parasite. ❖ Each colony can contain about 2 million zooids. ❖ Most ectoprocts are monoecism. ❖ Echinoids are dioeciously. ❖ Sea cucumbers are dioeciously. ❖ Ectoprocts grow by budding ❖ All species are aquatic (both freshwater and marine) and less than 1.5 mm in length. ❖ Brachiopods are commonly called lampshells because they resemble ancient Roman oil lamps. ❖ An anus always open outside of the lophophore. ❖ Metamorphosis occurs after larvae attach to the substrate. ❖ The unattached end of a sea lily is called the crown. ❖ Sea lilies attach permanently to their substrate by a stalk. ❖ Members of the class Crinoidea include the sea lilies and the feather stars. ❖ Sea cucumbers have no true brain. ❖ Most sea cucumbers ingest particulate organic matter using their tentacles. ❖ The class Holothuroidea has approximately 1,500 species, whose members are commonly called sea cucumbers. ❖ A chewing apparatus, called Aristotle’s lantern, can be projected from the mouth. ❖ The digestive tract forms a U-shaped gut in the calyx. ❖ There is no larval stage or metamorphosis in Chaetognaths. ❖ Sea cucumbers can Evert tubules of the respiratory tree, called Cuverian tubules. ❖ A pheromone that the queen releases controls the honeybee caste system ❖ The body of an insect is divided into three tagmata: head, thorax, and abdomen. ❖ An insect growth regulator (IGR) is a substance (chemical) that inhibits the life cycle of an insect. ❖ Grasshopper tympanal organs can detect sounds in the range of 1,000 to 50,000 cps. ❖ The human ear can detect sounds between 20 and 20,000 cps. ❖ Thermoregulation is a requirement for flying insects. ❖ Arrow worms are active predators. ❖ Arrow worms are active swimmers. ❖ Most Chaetognaths are planktonic, 0.5 to 12 cm in length, ❖ Entoprocts have a small body cavity that most zoologists consider a pseudo coelom. ❖ Most entoprocts are microscopic. ❖ Cycliophores can reproduce asexually by producing a larva stage, called the Pandora that is released and settles on the same host. ❖ In Cycliophores Protonephridia are used in excretion. ❖ The asexual feeding stage of symbion is about 0.3 mm tall. ❖ The body wall contains gland cells that eventually secrete the chitinous tube. ❖ The gonads are in the coelom. ❖ A flap of tissue called the epistome covers the mouth. ❖ The Phoronids consist of about a dozen marine species divided between two genera: Phoronis and Phoronopsis. ❖ Statoblasts are asexually produced and accumulate in the metacoel. ❖ A statoblast is a hard, resistant capsule containing a mass of germinative cells. ❖ Some freshwater ectoprocts produce a dormant stage called a statoblast. ❖ In others, simple gonads produce both sperm and eggs in the same autozooid. ❖ A pair of tubes called respiratory trees attach at the rectum and branch throughout the body cavity of sea cucumber. ❖ A pedicellaria is a small wrench-or claw shaped appendages with movable jaws, called valves. ❖ Zoologists believe that echinoderms show common ancestry with hemichordates and chordates because of deuterostome characteristics that they shows.