What is the distinction between marsupial and placental mammals? What will be an ideal response?
Marsupials are born in an embryonic state and then develop further in the mother's pouch. Placentals
develop internally in a placenta into which nutrients and oxygen are carried from the mother into the
embryo.
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What is the longest river in Southeast Asia?
A) Irrawaddy B) Chao Phraya C) Red River D) Mekong E) Salween
Who came up with the dynamic theory of tides?
a. Isaac Newton b. Pierre-Simon Laplace c. Galileo d. Pytheas
The distance between successive wave crests is called
A) wavelength. B) wave base. C) wave period. D) wave height.
Why are ancient impact craters difficult to identify on Earth?
A) they typically have been eroded or infilled with younger sediments B) impact craters on Earth are smaller than those on the Moon or Mars C) they typically lack shock metamorphic minerals D) there have been very few meteorite impacts on Earth