1.
2.
3.
SECTION A
Write full form of DCT.
Name the tissues which has intercalated disc. What is its function?
Ribosomes in prokaryotes is of 70 S type. What does “s' stands for and
what does it measure?
Complete the given sequence of taxonomic categories:
Species. --- --------- genus --------- (a) ------- (b) ------ phylum
kingdom.
4.
5.
Name the type of placentation shown in the figure A and B.
UN
Answers
Answer:
DCT : Distal Convoluted Tubule.
Cardiac Muscle has intercalated disc.
FUNCTION :
Cardiac muscle tissue works to keep your heart pumping through involuntary movements. This is one feature that differentiates it from skeletal muscle tissue, which you can control.
It does this through specialized cells called pacemaker cells. These control the contractions of your heart. Your nervous system sends signals to pacemaker cells that prompt them to either speed up or slow down your heart rate.
Your pacemaker cells are connected to other cardiac muscle cells, allowing them to pass along signals. This results in a wave of contractions of your cardiac muscle, which creates your heartbeat.
Bacteria and archaebacteria have smaller ribosomes, termed 70S ribosomes, which are composed of a small 30S subunit and large 50S subunit. The "S" stands for svedbergs, a unit used to measure how fast molecules move in a centrifuge.
SPECIES
GENUS
FAMILY
ORDER
CLASS
PHYLUM
KINGDOM
Axile placentation - placenta bears ovules developing from the central axis of a compound ovary corresponding to the fused margins of carpels. e.g., Citrus, Solanum.
Basal placentation- placenta present on the base of the unilocular ovary. e.g., Sonchus.
Parietal placentation - placenta bears the ovules on the inner wall of the ovary and their position corresponds to the fused margins of carpels.The ovary is one chambered. e.g., Argemone.
Free-central placentation - the ovules are borne on a central column without any septa and the ovary is unilocular. e.g., Stellaria.
So, the correct answer is 'Axile, Basal, parietal and free central'.