Transpiration: Mechanism, Types, Factors affecting transpiration, Biological significance and Disadvantages
Plants absorb a large quantity of water from the soil by root hairs and only a small part (1-2%) of this water is utilized by […]
Biology
Vacuoles: Structure, Types and Functions
Vacuoles are membrane bound cell organelles found almost in all the cells. They are small in animal cells whereas fungi and plants have large vacuoles. […]
Different Gastrointestinal hormones and their Action
The epithelium present in the alimentary canal secretes hormones. These hormones are carried by blood to the digestive glands which then release their digestive secretions […]
Differences between Mitochondria and Chloroplasts
S.N. Mitochondria Chloroplasts 1. They are smaller in size (1-4 µm). They are bigger in size (4-10 µm). 2. They occur in practically all eukaryotic […]
Differences between Rough Endoplasmic Reticulum (RER) and Smooth Endoplasmic Reticulum (SER)
S.N. RER (Rough ER) SER (Smooth ER) 1. It is composed mainly of cisternae. It is composed mainly of tubules and vesicles. 2. It bears […]
Differences between 70S and 80S ribosomes
S.N. Characteristics 70S Ribosomes 80S Ribosomes 1. Occurrence They occur in prokaryotic cells and in the mitochondria and plastids of eukaryotic cells. They occur only […]
Bacterial endospore: Structure, Stages of Sporulation and Germination
Spore is a resting or dormant cell which is metabolically inactive and is produced during unfavorable conditions like nutrition deficiency, extreme temperature and pH, presence […]
Structure and Types of Animal egg cell or ovum
Egg cell or ovum, also known as female gamete is formed by the process of oogenesis in female organisms. They are produced by follicle cells […]
Sequential events and stages in the development of frog (pre-embryonic, embryonic and post-embryonic development)
Introduction: In sexual reproduction, development of organisms begins with a fertilized egg or zygote. Zygote divides and re-divides to form an embryo. Embryo is the […]
Formation and development of male and female gametophytes in angiosperms
A gametophyte is the haploid phase in the life cycle of a plant that produces gametes. The process of formation of gametes or germ cells […]