Download IB BIO 5.3: CLASSIFICATION OF BIODIVERSITY SECTION QUESTIONS AND ANSWERS 2024-2025 A+ REVI and more Exams Applied Biology in PDF only on Docsity!
5.3.1 THE BINOMIAL SYSTEM.
What are Allium sativum and Allium cepa?
A. The same species but of a different genus
B. The same species of the same genus
C. Two different species of the same genus
D. Two different species of a different genus - ANS-“ WC. Two different species of the same genus
Explanation: Both of these organisms are called Allium so they belong to the same genus. They have
different species names: sativa and cepa, so they are two different species. So only option C is correct.
By the way, A. sativum is common garlic and A. cepa is the common onion.
5.3.1: THE BINOMIAL SYSTEM
What is the correct way of writing the scientific name of asparagus?
A. Asparagus Officinalis
B. asparagus Officinalis
C. Asparagus officinalis
D. Asparagus officinalis - ANS-V~ “WD. Asparagus officinalis
Explanation: The correct answer is D as it respects the convention for writing scientific names:
Genus name starts with a capital letter, species name starts with lowercase letter, both names are in
italics and genus name is written before species name.
5.3.1: THE BINOMIAL SYSTEM
Two kangaroos have the following scientific names respectively: M. giganteus giganteus and M.
giganteus tasmaniensis. What do you know about these two types of kangaroo?
A. They are categorised as two different species.
B. They are not able to interbreed.
C. They are two subspecies of the same species.
D. They belong to different genera. - ANS-V WC. They are two subspecies of the same species.
Explanation: The correct answer is C because the two types of kangaroo are in the same species but
different subspecies, therefore, they are in the same genus and are able to interbreed.
5.3.2: TAXONOMY
In the hierarchy of taxa, what is in a family?
A. A group of orders
B. A group of genera
C. A group of classes
D. A group of phyla - ANS- B. A group of genera
Explanation: A family is a group of genera (plural of genus)
2. Body has no exoskeleton .. specimen A
Body hasan exoskeleton. ....... 000s essen eee ee eee specimen B
3. Jointed appendages present............0. cece eee specimen C
Jointed appendages absent....... 0. cece eee eee eee specimen D
A. Specimen A
B. Specimen C
C. Specimen D
D. Specimen B - ANS-V “A. Specimen A
Explanation: An earthworm is a segmented worm (with bilateral symmetry) so only option A is true.
Answer: Oak, Quercus robur
Explanation: The leaves of the plant are not modified as needle shapes so you can move to 2. The leaves
are not heart shaped either, so move to 3. Leaves do not terminate in one main point so you can move
to 6. There you notice that the edges of the leaves are rounded and lobed so the correct answer is oak. -
ANS-/ 5.3.5; PLANT FEATURES
What type of tree is this? Use the dichotomous key provided to find it out.
1. Are the leaves modified as needle shapes?
Yes - go to4 No- goto2
2. Are the leaves heart shaped?
Yes - Alder Alnus glutinosa No - go to 3
3. Do the leaves terminate in one main point?
Yes - Birch Betula pendula No - goto 6
4. Does the plant have cones?
Yes - go to 5 No - Juniper, Juniperus communis
5. Are the cones long and narrow?
Yes - Spruce Picea abies No - Pine Pinus sylvestris
6. Are the edges of the leaves rounded and lobed?
Yes - Oak Quercus robur No - Maple Acer platanoides
C. Filicinophyta
Explanation: This plant has shallow roots and fronds for leaves, these are characteristics of
filicinophytes. - ANS-/ / 5.3.5: PLANT FEATURES
Which phylum does this plant below belong to?
A. Coniferophyta
B. Angiospermophyta
C. Filicinophyta
D. Bryophyta
5.3.5: PLANT FEATURES
The plant phyla that have vascular tissue are: - ANS-¥ ¥ Filicinophyta, coniferophyta and
angiospermophyta
Explanation: filicinophyta, coniferophyta and angiospermophyta are all phyla that possess vascular
tissue. Bryophyta do not have vascular tissue.
5.3.6: ANIMAL FEATURES
An animal has radial symmetry, a sac-like body with only one opening and tentacles with stinging
structures. To which phylum does this animal belong?
A. Cnidaria
B. Mollusca
C. Annelida
D. Porifera - ANS-/ WA. Cnidaria
Explanation: Cnidaria have radial symmetry and tentacles surrounding a single opening.
5.3.6: ANIMAL FEATURES
Which of the organisms, identified by the key below, represent an annelid?
1. Shows bilateral symmetry --> go to 2
Does not show bilateral symmetry --> Cnidaria
2. Has a segmented body --> go to 3
Does not have a segmented body --> go to 4
3. Has jointed legs --> |
Does not have jointed legs --> II
4. Has a shell --> Ill
Does not have a shell --> IV
A. Ill > 1. Shows bilateral symmetry. 2. Does not have as a segmented body. 4. Has a shell.
