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AlexFokin [52]
2 years ago
10

13. When one or more chromosomes fail to separate properly this is:

Biology
2 answers:
BigorU [14]2 years ago
8 0

Answer:

The answer is B

Explanation:

I hope you have/had an amazing day today and may God bless you<3

Bumek [7]2 years ago
4 0
B. non disjunction
Explanation- Non means not or no and Disjunction means a lack of correspondence
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When considering the phosphorus cycle, plants obtain most of their phosphorus?
love history [14]
This statement should be true, hope this helps!!!!!
5 0
3 years ago
A researcher was performing a test to check the effect of induced point mutation. But the experimental mouse could not survive.
miv72 [106K]

A researcher was performing a test to check the effect of induced point mutation. But the experimental mouse could not survive. The reason for this is a lethal mutation. This is a mutation in which the effects can result in the death of an organism carrying the mutation. It is also known as lethal factor or lethal gene.


<span>I hope it helps, Regards.</span>

7 0
3 years ago
Non-vascular plants include all the following types of plants except _________.
Leokris [45]

Answer:

 Whisk ferns

Explanation:

Non-vascular Plants. The non-vascular plants include mosses, hornworts and liverworts, and some algae. They are generally small plants limited in size by poor transport methods for water, gases and other compounds. They reproduce via spores rather than seeds and do not produce flowers, fruit or wood.

6 0
3 years ago
Which type of chemical bond involves atoms losing or gaining electrons?
vazorg [7]
It is called an Ionic bond.

6 0
3 years ago
In this exercise, the Kirby-Bauer diffusion test was used to test the sensitivity of S. epidermidis to penicillin, novobiocin, a
kiruha [24]

Answer:

Penicillin:

Staphylococcus epidermidis is more sensitive to Penicillin as compared to E. coli

Novobiocin:

Staphylococcus epidermidis is more sensitive to Novobiocin as compared to E. coli.

Gentamicin:

E. coli isolates showed high rates of resistance to gentamicin as compared to Staphylococcus epidermidis

Explanation:

Kirby-Bauer diffusion test:

This test is also known as disk diffusion antibiotic sensitivity testing. This test uses antibiotic containing disks to test its inhibition against particular bacteria.

Staphylococcus epidermidis:

Gram-positive bacterium, which is part of the normal human flora and found mostly in skin flora but less commonly in mucosal flora.

E. coli

Gram-negative bacteria because its cell wall have an additional layer.  During the staining process, it stains negative as compared to gram positive bacteria.

Penicillin:

This antibiotic kills bacteria by inhibiting the final step in cell wall biosynthesis, hence penicillin is most effective against gram-positive bacteria. Hence Staphylococcus epidermidis is more sensitive to Penicillin as compared to E. coli

Novobiocin:

Antibiotics which inhibits bacterial DNA synthesis. Its targets are the bacterial DNA gyrase and associated enzyme DNA topoisomerase. Due to extra membrane present outside gram negative bacteria this antibiotic is less effective against E. coli. Hence Staphylococcus epidermidis is more sensitive to Novobiocin as compared to E. coli.

Gentamicin:

Gentamicin is the broad spectrum antibiotic Its mode of action involves bacterial protein synthesis inhibition by binding to 30S ribosomes. E. coli isolates showed high rates of resistance to gentamicin as compared to Staphylococcus epidermidis

8 0
3 years ago
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