According to their physical make up, there are basically two types of animals- Vertebrates and invertebrates. Invertebrates are those animals that don’t have a vertebral column or backbone. On the other hand, Vertebrates are those animals who have a vertebral column or the back bone.
ASSESSMENT: NCERT QUESTIONS WITH ANSWERS
The reflex action is an involuntary action which goes on automatically. We don’t have any control on this type of action. Walking, on the other hand is a voluntary action which can be controlled and modified by us.
The ductless gland found on kidney is called as adrenal gland. Each kidney has an adrenal gland on it. This gland is also called as “Supra Renal Gland”. It has two parts- the upper- cortex and the lower- medulla.
Control and Coordination in animals are performed by the activities of different types of chemical substances. These chemical substances are known as Animal Hormones.
Landslides are very common in rainy season. Rains caused serious conditions during previous some weeks this year in many villages of Maharashtra. Many of these villages that were located in the laps of mountains vanished within no time.
Growth and movements in plants occur due to internal and external factors. Plant hormones are internal factors while light, touch, gravity and other stimuli are external factors that affect plant growth and movements.
The Pollution of atmosphere leads to severe consequences on local, regional, national and international levels.
The digested food is absorbed into the body from where it is distributed to all its cells.
Mode of nutrition through which an organism depends on other organisms for food due to its inability to synthesise food is called as heterotrophic nutrition.
