Biology, 16.10.2019 05:30 lupitasgirl3326
In aquatic ecosystems, phytoplankton and other photosynthetic organisms appear in the upper layer of the water, but not deeper layers. which statement explains this distribution?
a) the deeper layers are too dark for photosynthesis to occur.
b) the deeper layers are too cold for photosynthesis to occur.
c) the deeper layers have too little oxygen for photosynthetic organisms to survive.
d) the deeper layers have too much carbon dioxide for photosynthetic organisms to survive.
Answers: 3
Biology, 21.06.2019 20:00
In terms of alternation of generations, the internal parts of the pollen grains of seed-producing plants are most similar to a ) moss sporophyteb) moss gametophyte bearing both male and female gametangiac) fern sporophyted) fern gametophyte bearing only antheridia
Answers: 1
Biology, 22.06.2019 10:30
In order to study genetic mutations, scientists must study genetic material. which statement describes the genetic material scientists are most likely studying? a) they study alleles that contain chromosomes, which are rna.b) they study alleles that contain genes, which are chromosomes.c) they study chromosomes that contain genes, which are dna segments.
Answers: 1
Biology, 22.06.2019 13:00
Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?
Answers: 3
In aquatic ecosystems, phytoplankton and other photosynthetic organisms appear in the upper layer of...
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