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3 years ago

Which of the following describes the difference between nitrogen-14 and nitrogen-15?

1 answer:

7 0

Some of these can easily be eliminated by knowing that both nitrogen 14 and nitrogen 15 are isotopes ( same element, with the same amount of protons, but with different numbers of neutrons) of nitrogen. So if the only difference between nitrogen 14, 15 , and regular nitrogen is the amount of neutrons...how many protons and electrons should both nitrogen 14 and 15 have? After thinking, you should be able to eliminate A, B,and C.

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In a population of rabbits, there are 496 black rabbits and 27 white rabbits. Fur color is determined by a pair of alleles where

Troyanec [42]

Answer:

$0.96$

Explanation:

It is given that

B is the dominant allele which represents the black color

and b is the recessive allele which represents the white fur.

B being dominant will result into black color fur for genotype "Bb"

Given -

Frequency of black fur allele (p) is $0.8$

As per Hardy Weinberg's first law of equilibrium

$p + q = 1\\$

Substituting the value of p in above equation, we get -

$q = 1-p\\q = 1-0.8\\q= 0.2$

q represents the frequency for white fur allele

Frequency of white fur phenotype is

$q^2\\= 0.2^2\\= 0.04$

Frequency of homozygous black fur phenotype (BB) is

$p^2\\= 0.8^2\\= 0.64$

As per Hardy Weinberg's second law of equilibrium -

$p^2 + q^2 + 2pq = 1\\0.64 + 0.04 + 2pq = 1\\2pq = 1 - 0.68\\2pq = 0.32\\$

Combined frequency of homozygous and heterozygous black fur phenotype is

$0.64 + 0.32\\= 0.96$

5 0

3 years ago

In ascocarp the structure is not found?

Marina86 [1]

Answer:

hyphae

Explanation:

Please mark me as brainlyest

3 0

3 years ago

Read 2 more answers

crustal formation,which may cause the widening of an ocean is most likely occurring at the boundary between...?

balandron [24]

Divergent boundary.

This is the boundary between two tectonic plates move away from each other in opposite directions.

Explanation:

One major example of a divergent boundary is the mid-Atlantic ridge that cuts, longitudinally, across the middle of the Atlantic ocean.

When two tectonic plates move away from each other in opposite directions, the void they leave in between is filled by rising magma from the mantle and cooling to create new crust. A mountainous ridge along a boundary is evidence of a divergent boundary. The Atlantic ocean will therefore continue to widen as the North American and Eurasian Plates move away from each other. As new crust is formed at divergent boundary, old crust is being consumed at convergent boundary on another end of earth. This way tectonic plates of earth renew themselves.

Learn More:

brainly.com/question/12655537

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7 0

4 years ago

"A technician is reading the plates from a sputum culture. On the sheep blood agar (SBA), she sees flat spreading colonies with

sleet_krkn [62]

Answer:

P. aeruginosa

Explanation:

P. aeruginosa is a gram-negative bacteria that belongs to the family Pseudomonadaceae.

From the given question the following points lead us to conclude that the colony that will be growing would be of P. aeruginosa :

1. Flat spreading colonies with a metallic sheen on SBA - P. aeruginosa is known to produce smooth colonies with flat edges.

2. Fluorescent green color in the media with clear colonies on cetrimide agar - P. aeruginosa is known to produce pyoverdin which is a fluorescent pigment under low iron conditions.

3. Medium clear colonies that have a "fruity or grape-like odor" on MacConkey Agar - P. aeruginosa has a sweet fruity odor which is its characteristic odor because of the production of trimethylamine.

Thus, from all these characteristics one can conclude that the organism in the culture is P. aeruginosa.

6 0

3 years ago

For the growth curve to continue increasing, which of these must occur?

padilas [110]

I know the answer but where is the pic to show the acaod

4 0

3 years ago