Explain how the structural changes of fish heart to mammalia heart support evolution?

Explain heart sounds.

In lung fishes, the heart is

What is the feature of heart of fish?

Draw and label the internal structure of Heart.

In the following how the sap wood is converted into heart wood

What do you understand by ‘Homologous Organ’? How do the features of internal structures of the forelimbs of different vertebrate animals support the idea of evolution?

Humans are the cause of various oxides of nitrogen in the environment'-Judge the logic of the statement. Explain how high frequency sound harm hearing capacity and heart in human.

Explain how parental species A and T can participate in Divergent and convergent evolution. Analyze how honeybees carry information when they discover food.

Explain how air sack helps pigeon in its evolution. 'Communication exchange and problem solving are two important behavioural adaptation-Prove the statements with approipriate example.

The following is the illustration of the sequence of ovarian events (a - 1) in a human female. (a) Identify the figure that illustrates ovulation and mention the stage of oogenesis it represents. (b) Name the pituitary hormone that has caused the above mentioned event. (c) Explain the changes that occur in the uterus simultaneously in anticipation (d) Write the differences between 'c and 'h'. (e ) Draw a labelled sketch of the structure of a human ovum prior to fertilization.