Question:
What is a notochord? What does it do?
Answer:
The notochord is a long rod-like support structure (chord=string) which runs along the back of the animal separating the nervous tissue from the gut. It provides a place for muscles to attach for ease of movement.
Diversity in Living Organisms
Q 1.
What are the major divisions in the Plantae? What is the basis for these divisions?
Q 2.
Give two examples of Bryophyta plants?
Q 3.
Give three examples of the range of variations that you see in lifeforms around you.
Q 4.
On what bases are plants and animals put into different categories?
Q 5.
What is the criterion for classification of organisms as belonging to kingdom Monera or Protista?
Q 6.
Do sponges have a nervous system?
Q 7.
Name a parasitic disease caused by members of Nematoda.
Q 8.
What is the type of circulatory system present in Arthropods?
Q 9.
Name a symbiotic life form that grows on the bark of a tree as large, coloured patches.
Q 10.
Name the simplest of plants that do not have a well-differentiated body design.
Q 11.
Woese introduced by dividing the Monera kingdom into two sub-kingdoms. Name the two?
Q 12.
Amar, Ujala and Anara wrote the scientic name of mango as follows. Who wrote it correctly.
Amar - Mangifera Indica
Ujala - Mangifera indica
Anara - mangifera indica
Q 13.
Pines and Deodar belong to which group of Plants?
Q 14.
Sunflower, Maize, Wheat and Pea belong to which group of plants?
Q 15.
Commonly called flatworm, bilateral symmetrical, acoelomates are the features of which animal division?
Q 16.
Which is the largest group of animals?
Q 17.
Give three examples of Protochordata animals.
Q 18.
What is the main basis of differentiation between vertebrates and non-vertebrates?
Q 19.
Four Chambered heart, mostly viviparous, skin covered with hairs, skin contains sweat and oil glands, four chambered heart. Which category of vertebrates are we talking about?
Q 20.
Give examples of egg laying mammals
Q 21.
Give an example of mammal that can fly.
Q 22.
What do you mean by biodiversity?
Q 23.
Why is there a need for classification and systematic naming of living organisms?
Q 24.
Name the levels of classification proposed by Linnaeus. What happens to similarities among organisms as we go from top to bottom level?
Q 25.
In the hierarchy of classification, which grouping will have the smallest number of organisms with a maximum of characteristics in common and which will have the largest number of organisms?
Q 26.
Name the scientist who created the third kingdom for all microscopic unicellular organisms. What did he call it?
Q 27.
In which kingdom, you will place an organism which is multicellular, eukaryotic, heterotroph, lacks chlorophyll and has an ingestive mode of nutrition.
Q 28.
Name the organisms which are outside the classification.
Q 29.
Blue-green algae are classified with bacteria and placed in kingdom Monera.
Q 30.
What is Symbiotic? Give an example of organisms which exhibit this relationship.
Q 31.
Give examples of Thallophyta plants.
Q 32.
Which division among plants has the simplest organisms?
Q 33.
List important characteristics (at least three) of bryophytes.
Q 34.
How Phanerogams are divided further chiefly?
Q 35.
Define Cryptograms.
Q 36.
How do gymnosperms and angiosperms differ from each other?
Q 37.
In how many Phyla, the animal kingdom is divided into?
Q 38.
Name the phylum to which the following are included. (i) Spider (ii) Cockroach (iii) Prawn (iv) Housefly
Q 39.
Give examples of Porifera or Sponges.
Q 40.
Identify the phylum having following characteristics:
Q 41.
What are four main features of phylum coelenterates?
Q 42.
Animals belong to phylum Coelenterata are diploblastic. What do you mean by the term diploblastic?
Q 43.
Which animal phylum is considered to be first triploblastic animals?
Q 44.
Write important features about Phylum Platyhelminthes.
Q 45.
Which phylum is commonly called roundworms or pinworms?
Q 46.
Name the first animals (phylum) that have a true body cavity.
Q 47.
Differentiate between Annelida and Nematode.
Q 48.
Name the largest group (phylum) of animals.
Q 49.
Give examples of Arthropod animals.
Q 50.
How is a body of Arthropods segmented?