STD 11 - 17. Locomotion and movement — NEET STD 11 Science — Question

A water fern, which is used as a green manure in rice fields is

The artery can be distinguished from the vein in having

Assertion : Transmission of nerve impulse across a synapse is accomplished by neurotransmitters.
Reason : Transmission across a synapse usually requires neurotransmitters because there is a small space, i.e., synaptic cleft, that separates one neuron from another

Pulmonary artery carries

Alleles are

In which phylum nerve cells are found but nerves are absent

The theory of recombination of linked gene due to crossing over of chromosome during zygotene of meiosis was put forwarded by

Vasopressin stimulates reabsorption of water and reduction of urine secretion. Hence vasopressin is otherwise called

Assertion: A rise in GFR can activate the JG cells to release renin.
Reason: Renin can inhibit the glomerular blood flow and thereby the GFR back to normal.

Identify the wrong statements for poriferans from given statements.
(i) Metameric segmentation present in poriferans
(ii) Notochord is a mesodermally derived in poriferans.
(iii) Poriferans are primitive multicellular and have cellular level of organisation.
(iv) Digestion is intracellular in poriferans
(v) Poriferans are hermaphrodite and fertilisation is internal.