All categories

4 years ago

Salt and water are mixed together in a bowl. The salt dissolves. The bowl of salty

Biology

2 answers:

IgorLugansk [536]4 years ago

7 0

Option A :Salt and water are a mixture

Explanation:

The salt and water solution are best example of homogeneous mixture. Salt dissolves in the water completely and splits up into sodium and chloride ions. The solution is clear and is difficult or you may say impossible to separate by filtration.

This mixture of salt and water when left on the table for few days. it undergoes evaporation under the room temperature. All the water in the mixture evaporates leaving behind the salt in the bowl. Hence only the the bowl is covered with salt when left out on the table for few days

Sonbull [250]4 years ago

5 0

A. salt and water are a mixture

You might be interested in

Students are testing the james river for dissolved-oxygen levels. They test in the blue ridge mountains,at the rivers source,and

iogann1982 [59]

Answer: 21 holes

Explanation:

Yes

5 0

3 years ago

Read 2 more answers

Genetic linkage mapping for a large number of families identifies 4% recombination between the genes for Rh blood type and ellip

Cloud [144]

Answer:

0.2404

Explanation:

The genes R/r and E/e are linked and there is 4% recombination between them.

The possible genotypes and phenotypes are:

RR or Rr: Rh+ blood type
rr: Rh- blood type
EE or Ee: elliptocytosis
ee: normal red blood cells

Tom and Terri each have elliptocytosis (they are E_), and each is Rh+ (they are R_).

Tom's mother has elliptocytosis (E_) and is Rh- (rr), so she has the genotype Er/_r. His father is healthy (ee) and has Rh+ (R_), so he has the genotype eR/e_. Tom must have inherited his E allele from his mother and his R allele from his father, so he has the genotype eR/Er.

Terri's father is Rh+ (R_) and has elliptocytosis (E_), while Terri's mother is Rh- (rr) and is healthy (ee) with the genotype er/er. Terry could only receive the chromosome er from her mother, and because she is heterozygous for both genes the dominant alleles were both received from her father. Terri's genotype is ER/er.

The frequency of recombination is 4%, so 4% of the produced gametes will be recombinant. There are two possible recombinant gametes, so each will appear 2% of the times (a frequency of 0.02).

Tom will produce the following gametes:

eR, parental (0.48)
Er, parental (0.48)
er, recombinant (0.02)
ER (recombinant (0.02)

Terri will produce the following gametes:

ER, parental (0.48)
er, parental (0.48)
Er, recombinant (0.02)
eR, recombinant (0.02)

A child Rh- with elliptocytosis has the genotype rrE_. This can happen from the independent combination of the following gametes from Tom and Terri respectively:

Er (0.48) × er (0.48) = 0.2304 Er/er
Er (0.48) × Er (0.02) = 0.0096 Er/Er
er (0.02) × Er (0.02) = 0.0004 er/Er

And the total probability of having a rrE_ child will be 0.2304 + 0.0096 + 0.0004 = 0.2404

6 0

3 years ago

4. When energy is added, which bond is formed

klemol [59]

That would be a covalent bond

hope i helped hun
Dosvedonya:)

4 0

3 years ago

List the four factors that affect the size of population? Plz help

skad [1K]

Space, environment, weather, population increase and decreas

4 0

3 years ago

Which statement provides the best evidence that Earth has a nearly spherical shape?

asambeis [7]

Answer:

2. The altitude of Polaris changes in a definite pattern as an observer's latitude changes.

Explanation:

Since Polaris is located over the Earth’s tilt of axis it appears to follow the observer's latitude. If you were to follow Polaris from the North Pole(0°) to the Equator (90°), it will make a half circle. This will prove that the earth has a spherical shape.

4 0

3 years ago