Radial symmetry is NOT found in adults of phylum ______.
Which of the following statements are correct regarding female reproductive cycle?
A. In non-primate mammals cyclical changes during reproduction are called oestrus cycle.
B. First menstrual cycle begins at puberty and is called menopause.
C. Lack of menstruation may be indicative of pregnancy.
D. Cyclic menstruation extends between menarche and menopause.
Choose the most appropriate answer from the options given below:
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Nephrons are of two types: Cortical & Juxta medullary, based on their relative position in cortex and medulla.
Reason R : Juxta medullary nephrons have short loop of Henle whereas, cortical nephrons have longer loop of Henle.
In the light of the above statements, choose the correct answer from the options given below :
Match List I with List II with respect to human eye.
| List I | List II | ||
|---|---|---|---|
| (A) | Fovea | (I) | Visible coloured portion of eye that regulates diameter of pupil. |
| (B) | Iris | (II) | External layer of eye formed of dense connective tissue. |
| (C) | Blind spot | (III) | Point of greatest visual acuity or resolution. |
| (D) | Sclera | (IV) | Point where optic nerve leaves the eyeball and photoreceptor cells are absent. |
Choose the correct answer from the options given below: