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olya-2409 [2.1K]
3 years ago
10

The hypothesis that, when life originated on Earth, a macromolecule other than DNA served in the role of information storage, an

d that this same macromolecule carried out catalysis, is called:
Biology
1 answer:
Andreas93 [3]3 years ago
4 0

Answer:

RNA world hypothesis.

Explanation:

RNA is present as the genetic material in some viruses only. RNA is produced from the template DNA by the process of transcription and helps in the protein gene expression.

According to RNA world hypothesis, RNA is considered to be the first genetic material as it has the ability to store the genetic material. The oxyribose sugar makes the RNA more reactive than the DNA molecule. The RNA also has the ability to work enzyme known as ribozyme. Hence, RNA has the ability to store the information and acts as catalyst.

Thus, the answer is RNA world hypothesis.

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Specialized lymphatic capillaries called lacteals are _________.a. more numerous than blood capillaries. b. necessary for the tr
ratelena [41]

Answer: Option B.

Necessary for the transport of dietary lipids

Explanation:

Lacteals are specialized lymphatic capillaries that are finger like projections that extend into the small intestine. They are found in the intestinal villi of small intestine.

They transport absorbed dietary fats from the small intestine into the blood stream.

8 0
3 years ago
An aerotolerant anaerobe would be expected to grow _____ in a thioglycollate tube.
kodGreya [7K]
<h2>Aerotolerant anaerobe.</h2>

Explanation:

  • An Aerotolerant anaerobes adopts the process of fermentation to produce ATP.
  • Oxygen is not used by Aerotolerant anaerobes. It keep themselves safe from the oxygen molecules which are reactive.
  • Aerotolerant organisms do not require oxygen for their growth as energy is metabolised anaerobically. But can tolearte the presence of oxygen.
  • Aerotolerant anaerobe are expected to grow throughout the tube in a thioglycollate tube.
3 0
3 years ago
When you are injured and bleeding the clotting factors immediately start to clot and try to seal the wound. This would be an exa
Juliette [100K]

Explanation:

This would be an example of secondary homeostasis

During wound healing, which happens after bleeding from a cut, the homeostatic response is clotting; primary homeostasis involves the formation of a platelet plug at the site, from platelets within the blood

Fibrinogen and platelets form a clot, in order to prevent blood loss and infection.  Fibrin is formed through the activation of coagulation factors which stabilise the plug.

Further Explanation:

The nervous system is subdivided into; the central nervous system (CNS), which includes the brain and spinal cord, within the vertebral column; and the peripheral nervous system, which includes nerves that branch into the rest of the body from the brain and spinal cord. Nervous tissue responds to electrical impulses, allowing for communication between different regions of the body.

The peripheral nervous system is further divided into the somatic nervous system responsible for carrying out sensory and motor information between the peripheral nervous system- including sensory organs like the eyes; and central nervous system; and the autonomic nervous system (ANS) which regulates involuntary bodily functions like heartbeat, breathing and blood flow. The ANS is mainly acts unconsciously and affects smooth muscle and internal organs. It is related to homeostasis- where the body maintains a constant internal balance in pH, temperature, blood pressure etc.

During homeostasis the body maintains a constant internal balance in pH, temperature, blood pressure etc. Cells in a multicellular organism become specialized for particular tasks and communicate with one another in order to maintain homeostasis. Within the human body these are known as hormone cascades, where several complex steps occur- the tissues signal to one another with the use of hormones released by the endocrine system. The regulation (increase and decrease) of these secretions is achieved by negative feedback loops, where the release of certain substances during a cascade in turn halts the secretion of hormones at earlier stages.

Learn more about membrane components at brainly.com/question/1971706

Learn more about plasma membrane transport at brainly.com/question/11410881

Learn more about homeostasis at brainly.com/question/1601808

#LearnWithBrainly

7 0
3 years ago
Three events on the earth where solar energy is used for natural phenomena​
Sholpan [36]

Answer:

Solar phenomena are the natural phenomena occurring within the outer atmosphere of the Sun. These phenomena take many forms, including solar wind, radio wave flux, solar flares, coronal mass ejections, coronal heating and sunspots.

7 0
2 years ago
Read 2 more answers
The mixing of fats with water, assisted by molecules that have both nonpolar and polar ends, is called
Pie

Answer:

The mixing of fats with water, assisted by molecules that have both nonpolar and polar ends, is called <u>emulsification</u>

Hope that helps!

4 0
3 years ago
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