rhombohedral primitive cell

Unicellular (single celled) animals.Nutrition is heterotropi..

There are two types of cell division in eukaryotes namely Mitosis , the equational division and Meiosis ,the reductional division. There is another type of cell division seen in primitive organisms, called amitosis. It is a simple type of cell division in whi..

Prokaryotic and Eukaryotic Cells - There are two basic types of cells found in living organisms - the prokaryotic cells and the eukaryotic cells. This classification is based on three main features, namely; Organisation of biomembranes Nature of cytoplasmic o..

Types of Unit Cells - There are three types of non-primitive unit cells. Taking the example of a cubic unit cell we can see that there are three types. They are: fig 2.2 - Types of unit cells..

Summary - According to the modified cell principle, new cells arise only from pre-existing cells. Cells transfer their genetic information only by way of cell division. The mode of cell division is largely the same in all living organisms ..

2 SO 4 .10H 2 O Hexagonal a = b ≠ c α = β = 90°, γ = 120° Graphite, ZnO, CdS Rhombohedral a = b = c α = β = γ ≠ 90° Calcite, quartz, NaNO 3 Triclinic a ≠ b ≠ c α ≠ β ≠ γ ≠..

Chemical evolution resulted in the formation of life on earth about 3.8 billion years ago. The primitive cells that resulted from this process gradually gave rise to primitive forms of organisms such as bacteria, algae, fungi and protozoan. These organisms in tur..

Amoeba is a typical protozoan...

The ovaries lie in the abdomen and are the female reproductive organ. They secrete three steroid female sex hormones Oestrogens, progesterone and relaxin . Ovaries are two almond-shaped glands placed one on each side of the uterus, below the uterine tubes attached to the back of the broad ligamen..