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3 years ago

Select all that apply.

1 answer:

5 0

Boyle's law states that the relationship between pressure and volume of a fixed amount of gas at a fixed temperature is inversely proportional. This means that the higher the pressure, the lower the volume, in a proportional relationship. Therefore, of the statements listed, b: 'the temperature and the number of molecules must remain constant for the law to apply' and d: 'a<span>s the pressure of a gas increases, the volume decreases proportionally</span>' are correct.

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The protective layer of special oxygen molecules in the upper stratosphere that screens out much of The harmful radiation from t

Virty [35]

The biosphere is what i would choose

6 0

3 years ago

Read 2 more answers

4. A male green parakeet breeds with a female blue parakeet: All the offspring are green. What trait is

Harman [31]

Answer:

4. Green

5. 1 Green : 1 Blue parakeet

6. 100% green offsprings

7. Violet color

8. 0%

9. 1 Yellow : 1 white sulfur butterflies

Explanation:

4. A dominant trait is that which masks the phenotypic expression of its contrasting trait in a gene. Hence, the cross between a green and blue parakeet produced offsprings that were all green because the green trait is dominant i.e. mask the expression of the blue trait.

5. An heterozygous green parakeet will have genotype:Gg while a homozgous blue parakeet will have genotype: gg. A cross between Gg and gg will produce offsprings with genotypes: Gg and gg in the proportion 2:2. This means the phenotypic ratio of Gg (green) and gg (blue) is 1:1.

6. A homozygous dominant parakeet means genotype, GG while a heterozygous green parakeet means genotype, Gg. GG and Gg, if crossed will produce offsprings with genotypes: GG, GG, Gg and Gg. Since the allele for green color (G) is dominant over the allele for blue color (g), all the offsprings i.e 100% will be green colored.

7. A purebred flower means a flower that produces only one type of color and is homozygous. Hence, let's say a purebred red flower will have genotype RR while a purebred violet flower will have genotype VV. Hence, these two purebreds will be crossed to produce offsprings that all possess genotype, VR. According to the question, they are all violet. This means that the allele for Violet color is masking the phenotypic expression of the red color. Hence, the Violet color is a dominant trait.

8. A homozygous Violet and red flower will have the genotypes: VV and RR respectively. A cross between them will produce an offspring with genotype, VR. Since the Violet allele is dominant, it will be phenotypically expressed over the red allele. Hence, none of the offsprings i.e. 0% will be red-colored.

9. A heterozygous sulfur butterfly will be Yy while a homozygous recessive sulfur butterfly will be yy. Where Y is yellow allele and y is white allele. If Yy and yy are crossed, offsprings with genotypes Yy and yy will be produced in the ratio 1:1. This means that the phenotypic ratio of the cross between a heterozygous sulfur butterfly (Yy) and a homozygous recessive sulfur butterfly (yy) is 1 Yellow sulfur butterfly: 1 white sulfur butterfly.

3 0

3 years ago

Help!

oksano4ka [1.4K]

<u>Answer</u>: As the growth rate increases, the population size increases more rapidly. The slope becomes steeper.

An increasing growth rate means that more and more of the offspring will survive. Thus, this leads to a cumulative effect in which with an increasing growth rate, the slope becomes steeper.

If in the beginning only 1 out of 10 offspring will survive (r=0.1), then the population will increase with only one individual. However, if r=0.5 then 5 new individuals will be added. These in turn will be able to reproduce themselves with even higher r, which results in the cumulative effect mentioned above. The more individuals survive and the higher r, the faster the population size will increase.

No ecosystem is capable of sustaining such a growth for long periods of time. The population will reach and exceed a level called carrying capacity, which is the maximum number of individuals the ecosystem can sustain. Once this happens, the growth rate will be negative until the population size is once more under this level.

From now on, the population will vary around the carrying capacity with r switching from positive to negative in a continuous cycle. Furthermore, if this level is exceeded very much, then currently available resources will be consumed and thus the population size will plummet back to extremely low levels.

Locust swarms are a good example. The population size increases rapidly and devours all available food. If no more food can be found, then the majority of the individuals will die of starvation.

5 0

4 years ago

Fireworks exploding in the sky and giving off light are an example of a(n) _____.

crimeas [40]

Exothermic change. Because the firework when it exploded, released energy in the form of light. In exothermic changes energy is released, and in endothermic changes energy is absorbed.

7 0

3 years ago

Each red blood cell carries about 250 million molecules of hemoglobin. If every hemoglobin molecules is attached to four oxygen

MArishka [77]

Answer: One red blood cell will be able to carry one billion molecules of oxygen.

Explanation:

If each red blood cell carries 250,000,000 hemoglobin and every molecule of hemoglobin binds four oxygen molecules, the number of oxygen molecules carried by one red blood cell is 250,000,000 x 4 = 1,000,000,000. That is 1billion oxygen molecules is been carried by one red blood cell. Hemoglobin is a protein present in the red blood cell which binds and transports oxygen to the cells throughout the body. Hemoglobin has four binding sites for oxygen. The binding of one oxygen to its binding site on hemoglobin increases the binding affinity of subsequent oxygen molecules to the other binding sites on the hemoglobin. This phenomenon is known as cooperativity.

6 0

3 years ago