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4 years ago

Can someone please answer question 30 and 31 :)

Biology

1 answer:

aalyn [17]4 years ago

8 0

The students hypothesis would be something like:
"I believe that some seeds must be exposed to cold before they germinate."

But what the student is missing is some samples from seeds that are not exposed to cold, since they are trying to figure out whether the seeds should be exposed to cold or not.

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Pls help!!!

quester [9]

Answer:

The answer to this question is dogs.

8 0

3 years ago

Read 2 more answers

Can someone please Define Transgenic for me

Nutka1998 [239]

Being or used to produce an organism or cell of one species into which one or more genes of another species have been incorporated

5 0

3 years ago

Cortisone and cortisol are types of ________ produced by the middle cortical layer of the adrenal gland.

MaRussiya [10]

Answer:

glucocorticoids

Explanation:

4 0

2 years ago

The trait for medium-sized leaves in iris is determined by the genetic condition PP'. Plants with large leaves are PP, whereas p

loris [4]

Answer:

See the answer below

Explanation:

Medium size leaves genotype = PP'

Large leaves genotype = PP

Small leaves genotype = P'P'

Red flower genotype = RR

Pink flower genotype = RR'

White flower genotype = R'R'

Two plants each with medium-sized leaves (PP') and pink flowers (RR') were crossed.

PP'RR' x PP'RR' (let PP' = Aa and RR' = Bb)

Progeny and expected phenotypes

1 PPRR - large leaves, red flower = 1/16 x 640 = 40 seedlings

2 PPRR' - large leaves, pink flower = 2/16 x 640 = 80 seedlings

2 PP'RR - medium leaves, red flower = 2/16 x 640 = 80 seedlings

4 PP'RR' - medium leaves, pink flower = 4/16 x 640 = 160 seedlings

1 PPR'R' - large leaves, white flower = 1/16 x 640 = 40 seedlings

2 PP'R'R' - medium leaves, white flower = 2/16 x 640 = 80 seedlings

1 P'P'RR - small leaves, red flower = 1/16 x 640 = 40 seedlings

2 P'P'RR' - small leaves, pink flower = 2/16 x 640 = 80 seedlings

1 P'P'R'R' = small leaves, white flower = 1/16 x 640 = 40 seedlings

4 0

3 years ago

Explain how water pollution can also indirectly occur as an offshoot of soil pollution. Give at lease 2 examples in your respons

Murljashka [212]

Answer and Explanation:

The use of pesticides and fertilisers leads to soil pollution. These are often not easily biodegradable and so they accumulate in the soil and kill soil organisms. Rain water run-off may carry such chemicals into streams,rivers and lakes. These toxic chemicals can eventually find their way into the tissues of different organisms associated with aquatic ecosystem.

The accumulation of silt due to poor cultivation along the river banks and the destruction of riverine leads to soil erosion. The deposition of silt near the mouth of river makes the water turbid and so impedes the penetration of sunlight. This affects the aquatic organisms and pollute the water.

6 0

3 years ago