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insens350 [35]
3 years ago
11

Which two scientists created the current three-dimensional model of DNA?

Biology
1 answer:
Greeley [361]3 years ago
3 0
The two scientists that created the three-dimensional structure of DNA are James Watson and Francis Crick.
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The hydra is an example of an organism with a simple body plan that uses the same site for both digestion and nutrient distribut
garik1379 [7]

Answer:

Gastrovascular Cavity

Explanation:

Hydra is commonly found in freshwater ponds and ditches as solitary organisms, in underside of aquatic leaves and lily pads in cool,clean freshwater pools and streams. It has a *Cylindrical body shape*.

Hydra possesses an internal body cavity, the *Gastrovascular cavity *,lined by gastrodermis and has a single opening,the mouth,which serves as an anus.

The Gastrovascular cavity of Hydra is a site for *digestion and nutrient distribution*,and also serves as anus.

6 0
3 years ago
Leaves change colors when they lose
kari74 [83]

Answer:

D. chlorophyll, is the best answer

Explanation:

In fall, the leaves stop their food-making process. The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible

Hope this helps!

7 0
3 years ago
An operon contains introns and exons. True False
PolarNik [594]
True.An operon is a prokaryote. Its is a group of genes working together to make a specific protein.
6 0
3 years ago
Briefly explain why experiments having faulty design or inconsistent data are problems for scientists. List several reasons.
son4ous [18]
Experiments with faulty design or inconsistent data:
-decreases the experiment's reliability and validity
- wastes time and resources
- destroys the scientist's credibility in their field
-  may lead to issues of safety to the experimenter/s due to faulty design
- is discouraged especially in hard sciences where data obtained should be accurate and precise
Explanation:
There are many<span> reasons that experiments with faulty </span>styles<span> or with incorrect </span>knowledge are<span> problematic for scientists. One reason for them to be problematic </span>is that if<span> he or she were to poorly </span>live<span> what </span>they're learning<span>. </span>as an example<span>, </span>somebody<span> measured the mass of a book </span>properly<span> to be </span>two<span> pounds, and </span>somebody else<span> measured it </span>erroneously<span> to be </span>one<span> pound. </span>differently<span>, that faulty designed experiments and inconsistent </span>knowledge will be<span> problematic is lack of accuracy and </span><span>exactness.</span>
4 0
3 years ago
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What is the best definition of mutation
statuscvo [17]
Mutations. Definition. A Mutationoccurs when a DNA gene is damaged or changed in such a way as to alter the genetic message carried by that gene. A Mutagen is an agent of substance that can bring about a permanent alteration to the physical composition of a DNA gene such that the genetic message is changed
8 0
3 years ago
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