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deff fn [24]
3 years ago
14

Which is a single ring nitrogenous base

Biology
1 answer:
Viefleur [7K]3 years ago
5 0
Thymine, Cytosine, and Uracil and single ring nitrogenous bases (pyrimidines)
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What is the difference between a bony fish and a cartilaginous fish?
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Bony fish belong to Class Osteichthyes, while cartilaginous fish belong to Class Chondrichthyes. Bony fish have a bony skeleton, while cartilaginous fish have one composed mostly of cartilage. Bony fish have body coverings of scales, while cartilaginous fish are covered with dendritical projections (think shark skin).
Bony fish are found in fresh and salt water; cartilaginous fish are found only in salt water. Bony fish have gills covered by an operculum; cartilaginous fish have gill slits. Bony have no eyelids; the cartilaginous fish do. Bony fish have an air-filled swim bladder; cartilaginous fish have an oil-filled liver to keep them bouyant. Hope this helps! Whew!
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2 years ago
Most cell membranes are composed principally of
Maru [420]

Answer:

DNA and ATP 2. proteins and lipids 3. chitin and starch ... Singer proposed the fluid mosaic model of the cell membrane in which the cell membrane consists of a double lipid layer with proteins embedded in it to act as name tags or to aid in movement of larger molecules across the membrane.

Explanation:

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2 years ago
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The one-toed horse of today steadily evolved from its five-toed ancestor.​
Vesnalui [34]

Answer:

It is true that one-toed horse of today steadily evolved from its five-toed ancestor.​

Explanation:

  • Evolution is the law of nature.There is a continuous process of evolution in each biological species in nature.
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3 years ago
What is/are goals and functions of a negative feedback system?
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Providing long-term control over the body's internal conditions

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Adjusting the "set point" for body temperature based upon level of activity


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Barry was on an antibiotic, but after he took all of it, he had a rash and the doctor prescribed him an antihistamine. Which mos
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He had a bacterial infection, but then developed an allergy to the antibiotic.

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3 years ago
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