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Liono4ka [1.6K]
3 years ago
9

Two biologists co-discover a population of single-celled eukaryotes that do NOT have mitochondria. Whoa! One biologist thinks th

e cells must be from a lineage that never underwent endosymbiosis, but the second biologist thinks endosymbiosis happened at some point, but the mitochondria were later lost. Which of the following provides the BEST evidence to support the second biologist?
A. the cells are incapable of surviving without sunlightB. sexual reproduction is never observedC. the nuclear genome has some genes from proteobacteriaD. the cells also contain chloroplasts
Biology
1 answer:
SVETLANKA909090 [29]3 years ago
7 0

Answer: Option C

Explanation:

The amitochondriate eukaryotes may have genes that have been derived from purple alphaloproteobacteria because they do not have the mitochondria which is needed to optimize energy production in the presence of oxygen, can live and exist in a condition with little to no oxygen which is a characteristic of proteobacteria and hence are anaerobes obtaining energy by anaerobic respiration. They may have also undergone the endosymbiont theory but due to their environment which has little to no oxygen. They do not have a need for the mitochondria organelle and in the process lose this organelle.

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the salivary glands, stomach, and pancreas secrete ____________ enzymes to break down triglycerides into monoglycerides, fatty a
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The salivary glands, stomach, and pancreas secrete<u> lipase enzymes</u> to break down triglycerides into monoglycerides, fatty acids, and glycerol.

Lipases are a set of water-soluble enzymes that hydrolyze substrates such as triglycerides and phospholipids, have a similar structure and are essential in the metabolism of lipoproteins and lipids.

That is, the function of lipase enzymes is to hydrolyze triglycerides to generate diglycerides, monoglycerides, fatty acids and glycerol.

<u>About lipase enzymes</u>:

  • It acts on the neutral fats in the diet, splitting them into triglycerides or diglycerides and these to monoglyceride, which is the most easily absorbed fatty compound.

  • The action of lipase is much more manifest on triglyceride, and it is also much faster the higher the molecular weight of the fatty acid present.

  • It acts on the surface and in an aqueous medium, the emulsifying agent represented by bile salts is essential for optimum effectiveness.

  • They are widely distributed, with a presence in the animal and plant kingdoms and even in the simplest unicellular organisms.

Therefore, we can conclude that the salivary glands, stomach, and pancreas secrete lipase enzymes to break down triglycerides into monoglycerides, fatty acids, and glycerol.

Learn more here: brainly.com/question/15737562

8 0
3 years ago
The dorsal root ganglia mainly contain
ycow [4]

Answer:

C) cell bodies of sensory neurons

Explanation:

The dorsal root ganglia mainly contain cell bodies of sensory neurons.

See attachment for better visual understanding.

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D is the correct answer i think.


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aleksandr82 [10.1K]
A short one. At least.
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If the tube incubated at 100°C was placed back in the optimum temperature, would a reaction occur?
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