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ziro4ka [17]
4 years ago
8

Scientists believe that the Earth's early atmosphere lacked __________ gas because photosynthetic organisms did not yet exist

Biology
2 answers:
SSSSS [86.1K]4 years ago
5 0
Scientists believe that the Earth's early atmosphere lacked oxygen because photosynthetic organisms did not yet exist. Hope this helps and have a great day!
oksian1 [2.3K]4 years ago
5 0

The right answer is C. Oxygen

During photosynthesis, there is consumption of carbon dioxide and water to produce glucose and dioxygen. Glucose is the "fuel" of its growth. Cellular respiration will consume some of this glucose and oxygen to form oxygen and water.

So, if the atmosphere was lacking oxygen, it's simply because there was no photosynthesis producing oxygen.

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Connects the throat and the trachea contains the vocal cords allows you to speak and make sounds structure
agasfer [191]
Q. What connects the throat and the trachea contains the vocal cords allows you to speak and make sounds structure?

A. The larynx
3 0
3 years ago
Finches that live in an isolated area with limited access to seeds and water is an example of what mechanism in Darwin's theory
Brums [2.3K]

Answer:

c. Limits on population growth

Explanation:

Darwin was heavily influenced by Malthusian theory of how population growth was influenced by growth limits. For Darwin, the population growth of species of living beings would be influenced by the limits imposed by the environment in which these species live, through the amounts of natural resources available to the population.

Thus, Darwin concludes that when the environment allowed an abundance of natural resources, such as water and food, the population of living beings would tend to grow more, however, when natural resources are limited, the population would grow less. This is called "population growth limits".

An example of this can be seen in the question above, where finches that live in an isolated area have limited access to seeds and water.

4 0
3 years ago
Her appearance was pale, with a slightly jaundiced appearance noted. On 8/24, additional labs were drawn. Which lab abnormality
Law Incorporation [45]

Answer:

Excess amount of Bilirubin in the blood stream.

Explanation:

When there is an excess amount of bilirubin in the blood stream, it causes jaundice, with symptoms like; yellow eyes and skin, among others.

7 0
3 years ago
Help plssssssssssssssssssss
julsineya [31]

Answer:

B.)

Explanation:

3 0
3 years ago
True or False: Alpha-defensins and reactive oxygen species (ROS) are examples of anti-microbial molecules produced by profession
REY [17]

Answer:

The given statement is true.

Explanation:

Alpha- defensins belong to the family of mammalian defensin peptides that belong to the alpha sub family.  Defensins are anti-microbial molecules . They work against Gram positive and Gram negative bacteria, fungi and enveloped viruses. Alpha- defensins functions by attacking the intraluminal bacteria and fungal pathogens.

Reactive oxygen species are very reactive chemicals formed from oxygen. These are anti-microbial molecules. Reactive oxygen species are antimicrobial against Gram-positive and Gram -negative bacteria, viruses and fungi.

Learn more about defensins here:

brainly.com/question/16404467

#SPJ4

8 0
2 years ago
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