Answer:
-Includes reptiles, birds, and mammals
-All amniotes are tetrapods and vertebrates
-May involve a shelled egg or internal gestation
-Do not need for moist environment for reproduction
-Derived characters that identify an amniotes are 3 extra embryonic membranes: Chorion, Amnion, Allantois
-are Covered by shells
-Most hard and calcified
-Some soft (monotremes)
The correct answer is:
A. A group of related parts that work together to achieve a desired result.
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The vegetation of the tundra is composed of shrubs, grasses, mosses, lichens. Tree vegetation is very rare because of low temperature and short growing season.
Answer: DNA and RNA are both examples of nucleic acids
They consist of a strand of nucleotides with a phosphate group, a 5′ sugar and a nitrogenous base.
Extra info: DNA and RNA molecules are polymers. DNA is double stranded, whereas RNA is single stranded.
The nucleotides of DNA can pair together by base pairing, creating a strand that is complementary to its pair
Various types of RNA exist which have roles in protein synthesis as well as regulation of cellular programmes by fine-tuning gene expression.
