Question
How many hearts does an octopus
have?Solution
Octopuses have three hearts, which is partially related to their blue blood. Two peripheral hearts pump blood through the gills to collect oxygen, then a central heart circulates this oxygenated blood throughout the body to provide energy to organs and muscles. Additionally, octopuses have 9 'brains' - one central brain for overall control plus eight smaller ones. For comparison:
- Birds and mammals: 4-chambered hearts (two atria and two ventricles)
- Amphibians like frogs: 3-chambered hearts (one ventricle and two atria)
- Fish: 2-chambered hearts (one atrium and one ventricle)
In which direction is point E with respect to G? Statements:
I. F is in the north of G and E is in the west of F.
II. H is in west of G ...
Five persons R, S, T, U, and V live on different floors of a five-storey building such that the bottommost floor is numbered 1 and the floor immediately...
Seven persons T, U, V, W, X, Y and Z are living in seven different floors. Ground floor is numbered as one and the above floor is numbered as two and s...
How is R related to O?
I. O is wife of E. O and K are the only children of T. I is the only daughter of E. R is the grand-daughter of T.
I...
Among E, G, H, I, J and K, who is second to the left of G if all are sitting around a circular table facing the centre.
I. J sits third to left o...
Five persons M, N, O, P and Q, who all are of different heights. Who among the following is the shortest?
Statement I: N is shorter than only one...
Given below is a question followed by two statements numbered I and II, each containing some information. Decide which of the statement(s) is/are suffic...
How is E related to D?
I. D is the son of A’s wife who is the daughter of E’s wife.
II. E’s wife is mother-in-law of D&r...
The question given below consists of two statements numbered I and II below them. You have to decide whether the data provided in the statements are s...
Eight persons G, H, I, J, K, L, M and N are sitting around the circular table facing towards the centre. Who sits to the immediate left of I?
I. ...
Relevant for Exams:
