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kati45 [8]
3 years ago
7

Which term refers to the number of protons in an atom of an element

Biology
2 answers:
nignag [31]3 years ago
5 0
The atomic number refers to the number of protons in an element.
Katarina [22]3 years ago
3 0
The atomic number is the answer
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This is one possible cross (above) for the X-linked condition known as hemophilia. Which pair of parents is most likely to have
gtnhenbr [62]

Answer:

The options:

A. A hemophiliac mother and an unaffected father

B. A carrier mother and an unaffected father

C. A carrier mother and a hemophiliac father

D. An unaffected, non-carrier mother and a hemophiliac father

The CORRECT ANSWER IS C.

C. A carrier mother and a hemophiliac father

Explanation:

Hemophilia is known to be a recessive disorder, a woman would need to have two disease alleles (positioned on both X chromosome) for the disease to be expressed. Therefore, she would need to possess the disease allele from both parents (mother and father).

Hemophilia is an X-linked disorder, and it is hemizygous for male in terms of the hemophilia-related gene (with only a singular allele and express the phenotype linked with the allele). For the hemophilia allele to be inherited in an offspring, the male has to be hemophiliac.

Pairs of parents without a hemophiliac male would not have a hemophiliac daughter, excluding rare conditions (spontaneous mutations occuring in the germline or at growth and maturation of the embryo).

A homozygous woman for this condition (is hemophiliac) or heterozygous woman for the allele in consideration (is an unaffected carriers) could transfer a hemophilia allele to her offspring.

Pairs of parents that without a hemophiliac female or hemophiliac carrier would not yield a hemophiliac daughter (with the exclusion of rare spontaneous mutation situations).

Of the pairs above, a carrier mother and a hemophiliac father would most probably produce a hemophiliac daughter.

4 0
3 years ago
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Kidneys are often compared to filters because they cleanse unwanted waste from both frogs and humans true or false ?
PtichkaEL [24]

"Kidneys are often compared to filters because they cleanse unwanted waste from both frogs and humans" is TRUE.

Answer: Option A

<u>Explanation: </u>

Frogs also have the excretory system with two kidneys and similar to mammals. Its function is to eliminate the nitrogen product from the blood. Frogs make large volumes of dilute urine to wipe out harmful products from the tubules of the kidneys.

Tadpoles and aquatic frogs excrete the nitrogen as ammonia, but most terrestrial adults excrete it mostly as urea which is less threatening substance. A few tree frog species with little water access excrete the still less harmful uric acid.

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3 years ago
What family does the mushroom come from
Karo-lina-s [1.5K]
They come from the agaric family
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2 years ago
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Ill give brainliest to anyone who helps me with this
zalisa [80]

Answer:

Explanation:

The genes in DNA encode protein molecules, which are the "workhorses" of the cell, carrying out all the functions necessary for life. For example, enzymes, including those that metabolize nutrients and synthesize new cellular constituents, as well as DNA polymerases and other enzymes that make copies of DNA during cell division, are all proteins.

In the simplest sense, expressing a gene means manufacturing its corresponding protein, and this multilayered process has two major steps. In the first step, the information in DNA is transferred to a messenger RNA (mRNA) molecule by way of a process called transcription. During transcription, the DNA of a gene serves as a template for complementary base-pairing, and an enzyme called RNA polymerase II catalyzes the formation of a pre-mRNA molecule, which is then processed to form mature mRNA (Figure 1). The resulting mRNA is a single-stranded copy of the gene, which next must be translated into a protein molecule.

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A hockey puck slides across an ice rink more easily than it does across a rough concrete surface. Why is this?
Damm [24]
There is less friction between the ice and hockey puck. Concrete is generally more textured and rough, therefore creating more friction
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