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vladimir1956 [14]
4 years ago
7

A normal human karyotype has _____.

Biology
2 answers:
andre [41]4 years ago
5 0
46 is the normal number.

Ede4ka [16]4 years ago
3 0

Answer:

A normal human karyotype has 46 chromosomes.

Explanation:

A normal human karyotype has 46 chromosomes (23 pairs), which are organized into 22 autosomal pairs and a sexual pair (XY man and XX woman).

The human <u>karyotype</u> is the chromosome structure of each person. Its study or test serves to detect anomalies and errors in its shape, size and placement, thus facilitating the visualization and contrast of possible reproductive problems, cases of infertility and congenital malformations.

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Nitrogen and carbon are more abundant in proteins than sulfur. Why did Hershey and Chase use radioactive sulfur instead of nitro
lora16 [44]

Answer:

Hershey and Chase experiment confirms that DNA is the genetic material of the living organism, not the RNA or protein. They also got a noble prize for this discovery.

Hershey and Chase use the radioactive sulfur to label the proteins and distinguish them from the DNA because DNA do not contain sulfur. The radioactive label phosphorus was used to label the DNA as phosphorus is specific to DNA as they wants to know exactly the genetic material. They do not use the radioactive carbon and nitrogen because both carbon and nitrogen are present in DNA and RNA. This labeling may produce confused result as it label both DNA as well as protein. The result o radioactive phosphorus and sulfur determines that DNA is the genetic material of the organism.

4 0
3 years ago
Panic grass (Dichanthelium lanuginosum) can live in geothermally heated soils only when the fungus Curvularia protuberata is pre
Rudik [331]
<h2>Diffuse co-evolution </h2>

Explanation:

The term ‘diffuse co-evolution’ was given by Janzen in 1980 to describe the idea that selection on traits often reflects the actions of many community members, as opposed to pairwise interactions between species

The idea was further clarified by Gould in 1988 by focusing on a variety of ecological and genetic mechanisms that might lead to diffuse co-evolution in response to selection from multiple species

Diffuse co-evolution as a whole can be defined as when selection imposed reciprocally by one species on another is dependent on the presence or absence of other species

In the given example panic grass can live only when the fungus protuberata is present and for Curvularia protuberata to colonize Curvularia thermal tolerance virus must be present so there is a web of multiple species where one species is dependent on other species and that other species in turn is dependent on different species hence referred to as diffuse co-evolution

7 0
3 years ago
Which of the following is true regarding eukaryotic chromosomes?
QveST [7]

Answer:

choice B

Explanation:

8 0
4 years ago
The variety of life across the biosphere is called
marysya [2.9K]
I think biotic but im not sure
6 0
3 years ago
2. Suggest two ways that reflex reactions help maintain homoeostasis in the human body.
Nata [24]
<span>One reflex reaction to maintaining homeostasis in the body is shivering. In response to cold temperatures, the muscular system moves our muscles quickly to warm them up as a rapid, short term solution for homeostasis. Another example is the withdrawal reflex, which occurs as a response to pain. Pain receptors activated by the painful stimulus activate the motor neurons in the body, which in turn contract muscles to move parts of your body away from the pain.</span>
7 0
3 years ago
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