FINALS - UNIT II Flashcards
This refers to the major change in structure or form during development.
Metamorphosis
The insect cuticle is hard and forms unstretchable exoskeleton and it must be shed from time to time to permit the insects to increase their size during growth period.
Ecdysis or Molting
It refers to the time interval between two subsequent molting.
Stadium
It refers to the body form between the egg stage and its first molting and two subsequent molting.
Instar
It refers to the old skin left after molting.
Exuviae
Enumerate the types of Metamorphosis
- Ametabolous
- Paurometabolous
- Hemimetabolous
- Holometabolous
The insect undergoes slight or no metamorphosis. The young looks much like the adult. They keep molting even after adulthood.
Ametabolous
This refers to the gradual metamorphosis that involves a nymphal stage. The embryo develops into a nymph, excluding the larval stage. The nymphs look similar to the adults, and it undergoes 13 molts to become a full-grown adult.
Paurometabolous
A type of metamorphosis where an insect that undergoes incomplete metamorphosis due to a missing pupal stage. The young look very similar to the adult.
Hemimetabolous
A type of metamorphosis where the insect undergoes complete metamorphosis.
Holometabolous
This term refers to immature ovum or egg cells.
Oocytes
This type of fertilization refers to the combination of egg and sperm cells in sexual reproduction within the female body.
Internal Fertilization
This is a type of reproduction/fertilization where the sperm of the male fertilizes the egg cells outside of the female organism’s body.
External Fertilization
This refers to the development of an insect where it takes place within the egg.
Early Embryonic Development
This refers to the development of an insect where the insect hatches, changes of physical structure, size
Post Embryonic Development
