The Ethiopian realm is designated by

a. A.
b. B.
c. C.
d. D.
e. E.


Answer: b

Biology & Microbiology

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When you compare Australian marsupials to placental mammals today 

Marsupials are a very ancestral form of mammal, evolving before placental mammals over 70 million years ago. Today Australian marsupials can be compared to placental mammals on other continents.


A. the marsupials are all very primitive, having changed very little during the last 70 million years.
B. the marsupials are very similar to placental mammals in the ways they have adapted to similar ecological niches.
C. the marsupials have evolved much more rapidly than placental mammals and are more highly adapted.
D. the marsupial fossils look remarkably similar to the placental mammals of today.
E. living marsupials are little changed from the earliest marsupial fossil forms.

Biology & Microbiology

Each DNA nucleotide is composed of ____

a. a six-carbon sugar, a phosphate group, and one of twenty amino acids b. a five-carbon sugar, a nitrogenous base, and one of twenty amino acids c. a five-carbon sugar, a phosphate group, and one of four nitrogenous bases d. a six-carbon sugar, a nitrogenous base, and one of four amino acids e. a five-carbon sugar, a phosphate group, and one of four amino acids

Biology & Microbiology

Waxy coatings, such as found on skin, hair, and feathers of some animals and the cuticle of some

plants, are commonly used by living organisms for protection against water loss and for lubrication. Such waxes are considered to be a type of ____.

a. triglyceride b. steroid c. neutral lipid d. phospholipid e. fatty acid

Biology & Microbiology

Regulation of the Calvin Cycle

What will be an ideal response?

Biology & Microbiology