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3 years ago

Pls help me , this is due in 2 hours

Biology

1 answer:

Blizzard [7]3 years ago

5 0

Answer:

Control: untouched dish
Dependent variable: the different salt concentrations for preventing the growth of bacteria
Independent variable: agar

Control: the group that is not exposed to any pollutant (5th group)
Dependent variable: the effect of pollution on soybean plants
Independent variable: the pollutant

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Can someone help me with a biology related question? I'm offering good points!!!!! Help me out please.

miss Akunina [59]

First, write out all combinations for the parents:
SsBB:
SB
sB
SB
sB

ssBb:
sB
sb
sB
sb

So now that you know what to put on as the x and y for the Punnett Square, set it up:

 | SB | sB | SB | sB 
sB | SsBB | ssBB | SsBB | ssBB 
sb | SsBb | ssBb | SsBb | ssBb 
sB | SsBB | ssBB | SsBB | ssBB 
sb | SsBb | ssBb | SsBb | ssBb 

Now, listing each possible genotype and the number of times they show up in the square:
SSBB
0 times
SSBb/SSbB
0 times
SSbb
0 times
SsBB/sSBB
4 times
SsBb/SsbB/sSBb/sSbB/
4 times
Ssbb/sSbb
0 times
ssBB
4 times
ssBb/ssbB
4 times
ssbb
0 times

Since there are only 4 genotypes are possible, set up ratios of those four:

SsBB:
4 times/16 total = .25 = 25%

SsBb:
4 times/16 total = .25 = 25%

ssBB:
4 times/16 total = .25 = 25%

ssBb:
4 times/16 total = .25 = 25%

This means that the genotypes have a 25% : 25% : 25% : 25% likelihood.

Now, let's figure out the phenotypes of the 4 genotypes:
SsBB:
Ss = dominant
BB = dominant

SsBb:
Ss = dominant
BB = dominant

ssBB:
ss = recessive
BB = dominant

ssBb:
ss = recessive
Bb = dominant

So we have 2/4 that are S-dominant B-dominant and 2/4 that are S-recessive B-dominant.
This means that the phenotypes are:
2/4 = 50% Thin stripes with black eyes, and
2/4 = 50% Thin stripes with gray eyes.

I hope this helped you out :)

6 0

3 years ago

Assume that the import of a particular amino acid across the plasma membrane is observed (1) to occur only down its concentratio

Studentka2010 [4]

Answer:

The correct answer is - facilitated diffusion.

Explanation:

Facilitated diffusion is a form of facilitated transport of molecules such as amino acid, glucose, and others through the plasma membrane involving the passive or indirect movement of molecules along their concentration gradient, which is led by the presence of another molecule normally a pore or channel made up of integral protein.

Facilitated diffusion depends on several factors such as the size of molecules, type of molecules, similarity of molecules to extracellular matrix or fluid that slow or fast the diffusion process.

Thus, the correct answer is - facilitated diffusion.

8 0

3 years ago

A deer eats grass . Only ten percent of the energy from the grass is transferred to the deer . Where does the other 90% of the e

Arisa [49]

Answer:

Explanation:

but not all the time deers eat grass some people like me and my family buy food for the deers and then put a camera up and go hunting, but anyways that's sounds like the answer.

8 0

2 years ago

A dark colored rock composed of smaller pieces of irregularly shaped rock. Classify this rock by using the drop-down menus to de

diamong [38]

Answer:

Coarse-grained, jagged, non-banded

Explanation:

6 0

3 years ago

Read 2 more answers

Dandelions grow quickly and produce many seeds, ensuring that at least some plants will survive and produce seeds themselves. Wh

Pani-rosa [81]

Species strategies to survive and successfully reproduce define three basic survivorship curves. The survivorship curve type III is the one that best represents the Dandelion plants.

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According to the species strategies to survive, reproduce, and ensure their reproductive success, we can mention three basic curves,

Type I.

Mortality often occurs at the end of the cycle, representing species with low mortality.

Organisms exhibiting this type of survivorship curve have long life cycles and high probabilities to survive until they are old enough.

These species have few descendants and spend too much time and energy in parental care to ensure their reproductive success.

Type II.

The probabilities of dying are equals all along the cycle, at any age interval.

The number of dead individuals remains constant from the beginning to the end of the life cycle.

These species have reduced offspring, and they ensure their reproductive success by providing some significant parental care.

Type III.

Significant mortality during the early stages of life.

Only a few individuals reach the later life stages, getting to survive their first period of life. Survivors usually have a long life.

These species produce large offspring at the same time, but they provide little or no parental care.

The reproductive success of these species depends on the number of descendants and not on the parenting time spent.

According to this information, and the characteristics of the Dandelions, we might assume that this species is represented by type III curve.

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4 0

3 years ago