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HUMAN SKELETON -
Hard supportive or protective elements of the animal body form the skeleton system. It's study in osteology.
EXOSKELETON -
Present outside skin. It consists of nails, hair etc. Keratine protein present.
Covers the body. Produced by ectoderm. Consists of non-living material. May be moulted periodically during growth.
ENDO SKELETON -
Occurs inside body. Produced by mesoderm. Consists of skeletal tissue as bones & cartilage.
Excretion in Protozoans Excretion of metabolic wastes is dope almost exclusively by diffusion. All protozoans are ammonotelic i.e., the end product of their nitrogen metabolis
How does a plasma membrane regulate movement of molecules into and out of a cell?
List the four phases of meiosis I, and briefly explain what occurs during each phase Prophase I: DNA coils into chromosomes, the nucleolus and nuclear envelope disappear, the m
Each gene has a characteristic mutation rate. Mutation rates are often described as an average per gene basis. For instance, Drosophila has one detectable mutation per 10,000 loci,
history of biology
Write down all the four quantum numbers of the electron in the outermost shell of rubidium (At. no.= 37) atom. a) What type of hybridization is associated with N in NH 3 ? b
Determine the different types of sensory receptors There are different types of sensory receptors as follows: Visual receptors in the eyes for vision. Auditory receptor
Asymmetrical and Spherical - Metazoa Some creatures are asymmetrical: no matter which way we try to divide them through the middle, no two halves would appear alike. In simple
Marasmus is a disease due to the deficiency of both proteins and calories.The child is weaned out before one year of age and is given a diet low in both proteins and carbohydrates.
what microbe is the one that is shaped like a ball with spikes comming out
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