Answer: Option C. -> Adherens junction
:
C
Tight junctions help to stop substances from leaking across a tissue. Gap junctions facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules. Adherens junction help in cementing or packing the neighbouring cells together and are formed by a protein called Cadherin. Desmosomes are intercellular junctions that connect intermediate filaments to the cell surface and mediate strong cell-cell adhesion.

Answer: Option C. -> Intercalated discs
:
C
Intercalated disks are cross-bands that separate the opposing ends of cardiac muscle cells. These bands are the result of elaborate junctions of membranes at the cell's boundary. They help to hold adjacent cells together and transmit the force of contraction from cell to cell. Intercalated discs at some fusion points allow the cells to contract as a unit, i.e., when one cell receives a signal to contract, its neighbours are also stimulated to contract.
An intervertebral disk acts as shock absorber between each of the vertebrae in the spinal column by keeping the vertebrae separated when there is impact from activity.
Intervertebral foramen is an opening between vertebrae through which nerves leave the spine and extend to other parts of the body.
Interneuron is a neuron which transmits impulses between other neurons, especially as part of a reflex arc.
 

Answer: Option C. -> Biting and chewing
:
C
Mouth parts of cockroach are of biting and chewing type .These are considered as the most primitive mouth parts, it consist of labrum,labium,maxilla,mandibles and a hypopharynx.

Answer: Option A. -> Anchor epthelial cells
:
A and B
The basement membrane is form of extracellular matrix that underlies all epithelia. It provides structural support to epithelia and forms a mechanical connection between epithelia and underlying connective tissue. The basement membrane also regulates the metabolism, proliferation, survival and differentiation of epithelial cells. The basement membrane functions as filter and because epithelia lack their own blood supply, all small molecules and gases derived from the blood must diffuse across the basement membrane. The basement membrane also prevents epithelial cells from invading into connective tissue.

Answer: Option D. -> Ostia
:
D
Blood vascular system of cockroach is an open type. Blood vessels are poorly developed and open into space (haemocoel). Visceral organs located in the haemocoel are bathed in blood (haemolymph). The haemolymph is composed of colourless plasma and haemocytes. Heart of cockroach consists of elongated muscular tube lying along mid dorsal line of thorax and abdomen. It is differentiated into funnel shaped chambers with ostia on either side. Blood from sinuses enter heart through ostia and is pumped anteriorly to sinuses again. 

Answer: Option D. -> All of the above
:
D
Marophage is a large phagocytic cell found in stationary form in the areolar tissues or as a mobile white blood cell, especially at sites of infection. A macrophage has the ability to locate and 'eat' particles, such as bacteria, viruses, fungi, and parasites. Macrophages are born from white blood cells called monocytes, which are produced by stem cells in our bone marrow.

Answer: Option B. -> Neuroglia
:
B
Neurons contain axons (long, slender projections from the cells that conduct electrochemical impulses or action potentials). 
Neuroglia: 1. These are supporting cells of nervous tissue.
Neuroglia make up about half the volume of the CNS. - smaller than neurons, and they are 5 to 50 times more numerous

Answer: Option C. -> Muscle tissue--protection from pathogens
:
C
Muscle will not give protection from pathogens. The main function of the muscular system is movement.
Endothelium is a type of epithelium that lines the interior surface of blood capillaries.
Adipose tissue, or fat, is an anatomical term for loose connective tissue composed of adipocytes. Its main role is to store energy in the form of fat, although it also cushions and insulates the body. The cells in nervous tissue that generate and conduct impulses are called neurons or nerve cells.​​​​​​​
 

Answer: Option B. -> Falsely-stratified single layer of epithelial
:
B
A pseudostratified epithelium is a type of epithelium that, though comprising only a single layer of cells, has its cell nuclei positioned in a manner suggestive of stratified epithelia.

Answer: Option C. -> Mesoderm
:
C
The germ layers develop early in embryonic life, through the process of gastrulation. During gastrulation, a hollow cluster of cells called a blastula reorganizes into 3 primary germ layers: an inner layer called endoderm, a middle layer called mesoderm and an outer layer, called ectoderm.
Connective tissue arises from mesoderm.