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Arturiano [62]
3 years ago
10

Which were the earliest oxygen-producing life-forms?

Biology
2 answers:
djverab [1.8K]3 years ago
4 0
A. cyanobacteria is the answer!
s2008m [1.1K]3 years ago
3 0
A is the answer Cyanobacteria I hope this helps
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The replica fossil you just created models the actual formation of fossils on Earth. In your replica, what do the clay and the p
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The making of replicas of the original fossils, is pretty much the say way, just different materials, in which the fossils originally have been formed and preserved.

When an organism dies, be it a plant or an animal, it gets fossilized only if very quickly after the death it is covered with sediments or mud. The sediments or the mud protect the plant or animal from the outside influences, so once it is kind of in a vacuum, or protective layer if you will, in which parts of the plant or animal that are long-lasting are preserved.

The clay and plaster used for the replica, work in the same way, because they wrap around the fossil tightly and isolate it from outside influences, with the result being different though, as they just make a copy of the fossil.

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3 years ago
Why is it important for scientist use common unit such as the metric system
NikAS [45]

Answer:

A common measurement system allows them to make direct comparisons instead of having to know things like how much a certain animal weighs.

Explanation:

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2 years ago
Studies have been conducted on synthetic products
Andru [333]

Answer:

Studies have been conducted on synthetic products, including DDT and estrogen. The use of these synthetic products has been discontinued due to increased risk of cancer and other health concerns. Genetic engineering has increasingly been used in cattle, crops, and pharmaceuticals.

Explanation:

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3 years ago
During a pet scan, a london cabby is asked to describe the route she would take a fare from the west end theater district to har
bezimeni [28]
The correct answer is "increased activity of the right hippocampal formation".
Hippocampus is a brain area which is part of the limbic system and is located below the cerebral cortex. Humans have two hippocampi, one in each side of the brain. Hippocampus is responsible for the formation of long-term memories, by participating in the consolidation of short-term to long-term memory. It also plays a very important role in spatial memory and orientation.
The task that this experienced cab-driver is asked to perform is related to spatial navigation and orientation abilities. The right hippocampus has been shown to participate in the formation of memory for locations in specific environments, while the left hippocampus has been shown to be involved in autobiographical and episodic memory. As a result, the PET scan will show an increased activity of the right hippocampus. 
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3 years ago
What are pteridophytes?​
ki77a [65]

Answer:

A pteridophyte is a vascular plant that disperses spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. Ferns, horsetails, and lycophytes are all pteridophytes.

Explanation:

5 0
3 years ago
Read 2 more answers
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