Monotypic is a genus with a single species

(a) Reproduction : Living beings reproduce progeny, while non-living do not reproduce.
(b) Growth : Living beings show growth, while non-living do not grow.

The planet earth is full of thousands of species. To facilitate a systematic study of them Biological Classification is necessary.

Family: 
(i) Family contains a group of related genera with less number of similarities as compared to genus and species.
(ii) All the genera of a family have some common or correlated features.
(iii) Let us take example of dog and fox. They are members of the same family.

Largest botanical garden in the world is Royal Botanical Garden, Kew (London).
Some well-known botanical gardens in India are
(i) National Botanical Garden, Lucknow
(ii) Lloyed Botanical Garden, Darjeeling
(iii) Indian Botanical Garden, Sibpur, Kolkata

Mulus, sterile worker bees

No, this is not growth, as increase in size of ball of snow is just because of the addition of similar material externally.
In living organisms, growth is due to increase in body material from inside.

Non- living things also show growth, e.g., a mountain or sand dune grows by accumulating material externally on surface. But, this growth is considered as external growth in comparison to the growth of living things which is internal.

Yes, metabolism occurs due to two phenomena, i.e., anabolism and catabolism. The growth of living things occurs when quantity of anabolic reactions exceeds quantity of catabolic reactions.

In unicellular organisms like Amoeba, bacteria and unicellular algae, reproduction is synchronised with growth, i.e. they reproduce and grow by increase in number of cells.

The three-domain system was first invented in 1990. One main characteristic of the three domain method is the separation of Archaea and bacteria, previously, grouped into the single Kingdom Bacteria (or Monera). The three domains of life are as follows:
(a) Archaea
(b) Bacteria and
(c) Monera.

Amoeba shows various characteristics such as growth, reproduction, metabolism, etc., that are specific to living organisms. On the other hand, a sand particle does not show any reproduction and metabolism therefore, it is considered as non-living matter. Though, the sand particle shows growth which is also a characteristic of living things, but in this the growth is only external due to aggregation of many sand particles and not internal. Therefore, Amoeba is a living matter while a sand particle is a non-living matter.

(i) The taxonomic categories which are always used in hierarchical classification of organisms are called obligate categories.
(ii) The taxonomic categories from species to kingdom are broad categories or obligate categories. However, taxonomists have developed sub-categories in this hierarchy to facilitate more sound and scientific placement of various taxa.
(iii) These are intermediate categories.
(iv) They include subphyla, subclasses, suborders, subfamilies, subgenera, varieties or subspecies.

Now a days, biologists use several principles and criteria to classify the organisms. These are based on morphology, anatomy, cytology, physiology, phylogeny, reproduction, evolution, biochemistry and genetics. Thus, there are several characteristics differences which help in classification. This is the reason of change in classification systems every now and then.

(i) Lion and monkeys possess the mammalian characters.
(ii) Maintaining zoological parks conserver the endangered and critically endasgered species.
(iii) The natural biosphere reserves have variety of plants. 
(iv) Ria is a good observer, enthusiastic and nature loving.

Manuals and records basically help in understanding past flora and fauna of a given area. Take an example of a thriving city. There may had been a dense forest, rich in biodiversity, where we get to see densely populated cities today. The manuals and records of that area helps us in knowing about past richness in biodiversity.
We also come to know about extinct species, through manuals and records. Some of the extinct species may be close or distant relatives of some existing species. We can develop some evolutionary relationships between them.

(i)  Common name: Mustard.
(ii)  Parts of the name: First part represents the genus or generic name, while the second part represents the specific name.
(iii) They are written in Italics in order to highlight their Latin origin.
(iv) Linn written at the end of the name, is the abbreviation of the name of scientist Linnaeus, who gave the name to the plant.