Ribs
Feature is the present tense. The past tense is featured.
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Are is a present tense verb so "whales are mammals." is a present tense sentence.
Diaphragm is present in mammals .
Casein is a protein present in milk of mammals . Its absence would present problem for milk production in mammals .
The word laking is not a word that is commonly used in present day English. It is used as a dialectal term in some places as well as an obsolete word for "to present an offering".Did you mean the word lacking?The word lacking is a verb. It is the present participle of "lack" which means to be without something.
The Cell Wall was not present in the first eukaryotes.
All mammals present today are example of tertiary period mammals as we are living in tertiary period .
no thay are fish Only mammals have nipples
Catalase and superoxide dismutase.
Cilia are present in most of the mammals like in men. They are present through out the animal kingdom, most probably.
Bats are the only present-day mammals that can fly.