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Answer 1

Answer:

1) elements = sodium, silver, tin and silicon.

compounds = calcium corbonate, methane and corbon dioxide.

mixtures = soil , sugar solution, coal, air, soap and blood.

2) Neuron is a unit cell of nervous tissues which transmits message in our body. each neurone has a long Exon connected with a body cell which possess many branched processes,called dendrites. it looks like a small tree with thin hair-like parts arising from its ends.

3) Vertebrates are further classified according to several criteria like exoskeleton, respiratory organs, method of giving birth, number of chambers in heart, mode of living etc. They are further classified into classes Pisces, Amphibia, Reptilia, Aves and Mammals.

4) view above picture for answer

5) view above picture for answer

hope the answer helps you unni.

Answer 2

Answer:

The Strange situation is a standardized procedure devised by Mary Ainsworth in the 1970s to observe attachment security in children within the context of caregiver relationships. ... Much research in psychology has focused on how forms of attachment differ among infants.

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