Question: 13
The word ‘arthropod’ means
A. Jointed feet
B. Jointed head
C. Presence of eight legs
D. Segmented body
E. Bilateral symmetry
Correct Answer: A. Jointed feet
Explanation:
The word arthropod in Greek means jointed feet. Presence of jointed feet is the characteristic feature
of arthropods.
Question: 14
Which of the following is included in aphotic zone?
A. Bathypelagic
B. Abyssopelgic
C. Mesopelagic
D. Hadopelagic
E. All of the above
Correct Answer: E. All of the above
Explanation:
All the above mentioned zones are devoid or have little light and are called aphotic zones. Aphotic
zone is the epipelagic zone. Very few organisms live in the hadopelagic (deepest) zone.
Question: 15
Engrailed proteins are
A. Tethering proteins
B. Transcription factors
C. Ubiquitins
D. Signaling molecules
E. Carrier proteins
Correct Answer: B. Transcription factors
Explanation:
Engrailed proteins are transcription factors which play a major role in brain development in many
species. They determine the midbrain/hindbrain border and aid in neuronal axon guidance.