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Why are summer days longer than winter days on earth?
answered
Jan 6, 2021
Physics
high-school
3
votes
179k
views
Various observations suggest that V(D)J recombination, which is an essential process for the maintenance of the vertebrate immune system, was evolutionarily derived from DNA transpositional recombination.
answered
Nov 20, 2020
Biology
high-school
3
votes
24.4k
views
What substance is a reactant, along with oxygen, in cellular respiration? A) fat B) sugar C) water D) carbon dioxide Eliminate
answered
Oct 7, 2020
Biology
middle-school
2
votes
27.4k
views
Identify the order of the events and layers in this cross section image, (1) is the oldest, (9) is the youngest.
answered
Apr 20, 2020
Biology
college
4
votes
159k
views
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