2) which of the following is not one of the main components of the cell theory? a) cells must contain dna b) all cells come from other cells c) all living things are made of cells 7) a class of chemical called a neurotransmitter is important in the transmission of nerve impulses. neurotransmitters are packaged by the cell into small, membrane-bound sacs called vesicles. upon receiving a chemical signal, the vesicles move toward the cell membrane and fuse with it, releasing the enclosed neurotransmitters from the terminal end of the nerve cell. which organelle is most likely responsible for packing neurotransmitters into a vesicle? a) nucleus b) mitochondria c) golgi apparatus

The correct answer will be options-

Case I- option-A

Case II- option-C

Explanation:

Case I

The cell theory was proposed by the Schleiden and Schwann in 1839 which stated that all organism is made up of the cell, the cell is the structural unit of life and further modified by Virchow which added that cells arise from pre-existing cells.

Since cell theory does not discuss the genetic material of the organisms, therefore, option-A is the correct answer.

Case II

Neurotransmitters are the molecules which act as chemical messengers as well as hormones. The neurotransmitters play an important role in the signalling through the nervous system they help convert the electrical signal into chemical signals.

The neurotransmitters are stored in the vesicles in the dendrite synaptic knob which are packaged by the membrane formed by the Golgi apparatus.

Thus, Option-C is the correct answer.

common management practices in dairy and poultry farming are: (i) proper shelter facilities and their regular cleaning. (ii) some basic hygienic conditions such as clean water, nutritious food, etc. (iii) animals are kept in spacious, airy, and ventilated place.

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.