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Anit [1.1K]
3 years ago
7

Which of these bases form a true complementary pair?

Biology
2 answers:
MA_775_DIABLO [31]3 years ago
7 0
Cytosine and guanine,
The way I remember is cars in the garage (cytosine and guanine) and apples on the trees (adenine and thymine)
boyakko [2]3 years ago
5 0

Answer:

cytosine and guanine

Explanation:

First choice and second choice is incorrect because look at our answer. (Cytosine pairs with Guanine, and thymine pairs with Adenine)

Fourth is incorrect because thymine pairs with Adenine (and in RNA Uracil pairs with Adenine)

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Please help will mark brainliest :)
Colt1911 [192]

OPTION C IS THE CORRECT ANSWER

BECAUSE :

An isolated system is one that cannot exchange either matter or energy with its surroundings.

5 0
3 years ago
What is one organism that has Capsular Polysaccharides Enhance Virulence. Describe the bacterium, important characteristics,dise
Alex Ar [27]

Answer:

Streptococcus Pneuomiae

Explanation:

I think that S. Pneumonae would be the most characteristic example of a pathogen with a capsular polysaccharide virulence factor.

This is a gram-positive, catalase-negative, alpha-hemolytic and optochin-sensitive bacterium. It is responsible for a broad spectrum of disease, most importantly community-acquired pneumonia, sinusitis, otitis media and meningitis in adults.

Sign and symptoms of an S. Pneumoniae disease can vary, but it commonly includes fever, difficulty breathing, productive cough, headache and, in the case of meningitis, neck rigidity, and diminished alertness.

Interestingly, there are other Streptococcus species (i.e. Streptococcus Viridans) that share some of S. Pneumoniae characteristics and is clinically relevant (can cause heart inflammation, also known as endocarditis, in patients with prosthetic heart valves), but lacks the polysaccharide capsule, effectively making this organism a much less virulent one.

5 0
3 years ago
What does it mean to be a retrovirus?
olganol [36]
1. <span>Any of a group of RNA viruses whose RNA is used as a template inside a host cell for the formation of DNA by </span>means<span> of the enzyme reverse transcriptase. The DNA thus formed is inserted into the host cell's genome. Most </span>retroviruses<span> can cause cancer. </span>Retroviruses<span> also include HIV.

2. </span>Prokaryotes<span> are 1-celled organisms that </span>do<span> not have a nucleus or any other membrane-bound organelles inside them. The name </span>prokaryote<span> itself actually lets you know that there isn't a nucleus, since pro </span>means <span>before and karyo refers to nucleus.

3. </span>Antibiotic resistance<span> occurs when </span>bacteria<span> change in some way that reduces or eliminates the effectiveness of drugs, chemicals, or other agents designed to cure or prevent infections. The </span>bacteria<span> survive and continue to multiply causing more harm. </span>Bacteria<span> can </span>do<span> this through several mechanisms.</span>
7 0
4 years ago
In this example, a flower can either express the dominant trait (R), red petals, or the recessive trait (r), yellow petals. If t
bekas [8.4K]

Answer:

25%

Explanation:

Since there are 2 flowers, start with 50% and 50% to make it simple. And since the red is dominant, it's stronger than yellow. So instead of them being equal chances, it's 75% to 25%. Hope this helped!

7 0
3 years ago
Answer to what type of arthropod appendage is comprised of a single series of segments attached end-to-end, rather than branchin
Rus_ich [418]
 The uniramous type of t<span>he </span>appendages<span> of </span>arthropods are comprised of a single series f segments attached end-to-end, rather than branching into two. The other type of arthropod appendages are biramous. The biramous limb <span>branches into two, and each branch consists of a series of segments attached end-to-end.</span>
4 0
3 years ago
Read 2 more answers
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