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White raven [17]
3 years ago
13

Which scientist first said that planets travel in fixed paths or orbits

Biology
2 answers:
pantera1 [17]3 years ago
8 0
The first scientist that said that planets travel in fixed paths or orbits is Kepler. A
Ulleksa [173]3 years ago
8 0

Answer:

Ptolemy

Explanation:

Just did the quiz lol

Hope i helped! xx

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what is causing global warming a an increase in plate tectonic movement be the reversal of Earth's magnetic poles see if influxe
mezya [45]

Answer:

Changes in the composition of the atmosphere

Explanation:

Although this answer is very vague and generalized, it is the correct answer.

The increase in greenhouse gas emissions in the atmosphere from modern manufacturing and engineering has increase carbon dioxide and methane concentrations in the upper atmosphere. These gasses have a chemical composition that allows the absorption and release of longwave radiation back to the Earth's surface slowly increasing the global average temperature.

4 0
2 years ago
Identify all of the biotic factors below.
Alja [10]
Rabbit, insect are biotic meaning living.
7 0
2 years ago
What act as a root in the pteridophytes ​
ra1l [238]

Answer:

The root system is always adventitious. The stem is either underground or aerial. The leaves may be microphylls or megaphylls. Their other common characteristics include vascular plant apomorphies (e.g., vascular tissue) and land plant plesiomorphies (e.g., spore dispersal and the absence of seeds).

Explanation:

3 0
2 years ago
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Under which conditions are the lac structural genes expressed most efficiently?
madam [21]

Lac genes are most effectively expressed in presence of Lactose and its analogs when glucose is absent.

Explanation:

A unit of prokaryotic gene expression and regulation,which includes structural genes and regulatory sequences recognized by regulatory gene product is called operon.

<em>Lac </em>structural genes are a part of<em> Lac</em> operon. The <em>Lac </em>operon consists of three, structural genes,an operator and a promoter.The product of Lac operon is involved in the conversion of disaccharide lactose into glucose and Galactose.

Lactose and its analogs are inducers of<em> Lac </em>operon. So, the structural genes are best expressed in presence of Lactose. Glucose and galactose are repressors of lac gene so the genes are repressed in presence of glucose.

4 0
3 years ago
What will NaHCO3 provide for the plant during photosynthesis?
Alekssandra [29.7K]

Answer & Explanation:

The function of the sodium bicarbonate in this experiment, was providing carbon dioxide for photosynthesis to occur. ... For photosynthesis to happen for a light independent reaction, carbon dioxide needs to enter the plant.

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3 years ago
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