All categories

3 years ago

Which line best represents the level of oxygen gas in the atmosphere during the Proterozoic?

Biology

1 answer:

katrin2010 [14]3 years ago

5 0

Explanation:

C- this line shows a gradual increase

Just before the Cambrian explosion, the atmosphere became oxygenated, leading to an explosion of new life in the form of primative blue green algae called cyanobacteria and oxygen dependent organisms in the Proteozoic Eon (2500-541 million years ago). Later, multicellular organisms followed, along with higher levels organization and complex life. Oxygen levels rose from low levels, steadily over this period of time.

Further Explanation:

The rise in O2 gas within the aquatic habitat and atmosphere is attributed to photosynthesis in cyanobacteria which allowed respiring eukaryotes to thrive.

Photosynthesizing cells in blue green algae contain chlorophyll, a specialized compound which facilitates the conversion of light energy to energy stored in carbohydrates in the process photosynthesis. This is a chemical pathway that’s integral to producing energy in primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent.

With the evolution of oxygen dependent organisms like Ediacara biota, came respiration in the mitochondria. Eukaryotes utilize glucose along with oxygen for the production of ATP in the Krebs’s cycle via the oxidization of pyruvate( through the process of glycolysis). Oxidative phosphorylation describes a process in which the NADH and FADH2 made in previous steps of respiration process give up electrons in the electron transport chain these are converted it to their previous forms, NADH+ and FAD. Electrons continue to move down the chain and the energy they release is used in pumping H+ to produce ATP from ATP synthase. At the end of the ETC molecules of oxygen accept electrons and protons to form molecules of water.

Learn more about Photosynthesis at brainly.com/question/4216541

Learn more about cellular life brainly.com/question/11259903

Learn more about cellular respiration at brainly.com/question/11203046

#LearnWithBrainly

You might be interested in

Which of the following statements correctly describes a DIFFERENCE between the endocrine and nervous systems, which both communi

scoray [572]

Answer:

b is correct

Explanation:

6 0

3 years ago

___is a variety of fungi that can be found growing on walls, ceilings, leather, wallpaper, or food.

allsm [11]

Answer:

mold

Explanation:

4 0

3 years ago

The purpose of ______ is to pass a copy of a cell's gene to cells in the next generation. The purpose of ______ is to pass the p

AysviL [449]

Cell division and inheritance I think

3 0

2 years ago

With the assumption that schmid-type metaphyseal chondrodysplasia is rare, is this type of dwarfism inherited as a dominant or r

Marrrta [24]

Answer and explanation;

-The nearly one-to-one ratio seen in the offspring suggests it is likely inherited as a dominant trait, with the dwarf parent being heterozygous for the dwarf allele along with the normal parent being homozygous for the normal allele.

-Metaphyseal chondrodysplasia, Schmid type (MCDS) is a type of skeletal disorder in which there is abnormal bone formation at the end of the long bones (metaphyses). MCDS is caused by a mutation in one of the collagen genes. The MCDS mutation is passed on in an autosomal dominant manner.

3 0

3 years ago

Physiology is the study of

NikAS [45]

Answer:

The emphasis on integrating molecular, cellular, systems and whole body function is what distinguishes physiology from the other life sciences.

Explanation:

4 0

4 years ago

Read 2 more answers