Biology, 02.01.2020 09:31 DoyleAK108
Cyanobacteria, once referred to as blue-green algae, has a fossil record that dates back nearly 3.5 billion years and is among the oldest fossils known. the cyanobacteria/ blue-green algae had cell walls and were photosynthetic. a few hundred years ago, this organism was classified as a plant, then as a protist. today it is classified in the eubacteria because it
a) is photosynthetic.
b) is know to be prokaryotic.
c) is the ancestor of land plants.
d) has cellulose cell walls and chloroplasts.
Answers: 1
Biology, 21.06.2019 19:00
The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.
Answers: 3
Biology, 22.06.2019 15:30
Which of these would most likely be a stimulus that would cause the body to initiate feedback mechanisms a.) normal body temperature in an arctic environment b.) normal boy temperature in a tropical environment c.)light physical activity d.)low blood sugar
Answers: 2
Cyanobacteria, once referred to as blue-green algae, has a fossil record that dates back nearly 3.5...
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