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3 years ago

Which of the following is a scientific question the student might ask?

Biology

1 answer:

Neporo4naja [7]3 years ago

4 0

Answer:

The correct option is C) How does sunlight affect a model of a biogeochemical cycle?

Explanation:

A scientific question can be described as a question based on which a hypothesis can be made and observations and experiments can be performed. The results from these experiments and observations would account for the validation of a hypothesis. Hence, a scientific question should be a question based on which a hypothesis can be made and experiments can be performed.

In the option C, the sunlight might increase or decrease various processes of the biogeochemical cycle. We can hypothesize and perform experiments to get the results. Hence, it is a scientific question.

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What are the abiotic factors associated with ecosystems?

xxTIMURxx [149]

Answer:

Option B, temperature, water and soil nutrients

Explanation:

Abiotic factors are those which do not have life in them and are unable to exhibit the functions of a living organism such as locomotion, reproduction, feeding, respiration etc.

All the set of factors in option B i.e temperature, water and soil nutrients are not living things as they do have any of the characteristics of living beings and thus they can be considered as abiotic factors.

While in all other options except option B, i.e option A, C, and D factors like animal, grass and animal life are biotic factors as they have life and are able to perform functions of living beings.

Thus, abiotic factors associated with ecosystems are temperature, water and soil nutrients

5 0

3 years ago

The mockingbirds that darwin collected on different islands in the galápagos belong to four subtly different species. this patte

Semenov [28]

Hey there!

I think you mean the Finches. Each Finch has a beak that is very similar to other beaks on the other islands. This shows that they are related. Their beaks change so that they can live better in their environment. They all had a common ancestor.

I hope this helps!

8 0

4 years ago

assume that Q is the frequency of the recessive gene R expressing y color piece and that in a isolated area 68 plants with red a

Oksi-84 [34.3K]

Explanation:

q= 0.566

Homozygous individuals have two copies of the same allele for a gene. Homozygous dominant individuals carry two copies of the dominant allele, while homozygous recessive individuals carry two copies of the recessive allele.

Further Explanation:

DNA sets contain genes that may have different forms named alleles. DNA, which is the genotype, is transcribed into mRNA and later translated into amino acids which are connected together by rRNA to form proteins which constitute the phenotype of an organism. DNA sequence mutations form new allles, impacting the resulting mRNA, and thus the encoded protein. Within species, there may be adaptation, along with genetic drift, preferential breeding, and natural selection.

Within a population certain alleles are fixed over time. In Hardy-Weinberg-allelic frequencies, the equilibrium for a particular gene is not undergoing evolution, being stable for several generations. Mutations, during this time affect the corresponding mRNA, and thus the encoded protein. Evolution may occur within populations, along with genetic drift, selective mating, and natural selection.

Over time, certain alleles become fixed within a population. Equilibrium for a specific gene is not undergoing evolution in Hardy-Weinberg-allelic frequencies are stable for several generations. During this period, mutations do not occur within the population, this is shown as

$p^{2} + 2pq +q^{2} = 1$ ....(eqn i)

where...

p represents the dominant allele frequency

q represents the frequency of the recessive allele

q^2 = the genotypic frequency of the homozygous recessive

p^2= the genotypic frequency of the homozygous dominant

2pq= frequency of the heterozygous genotype

and simply p+q= 1 ...(eqn ii)

The allelic freq. of r is denoted by q and the allelic frequency, R is denoted by p...

The total number of individuals= 32+ 68= 100

Thus q= √ $q^{2}$ = homozygous recessive individuals (white flowers)

Since there are 32 white flowering plants , freq rr= 32÷ 100= 0.32

...thus $q^{2}$ =0.32

and q= √ $q^{2}$ = √0.32= 0.566

Learn more about mutations at brainly.com/question/4602376

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

#LearnWithBrainly

8 0

4 years ago

What hormone causes the heart to pump faster?

telo118 [61]

Answer:

Many hormones cause the heart to pump faster

Explanation:

However, norepinephrine (NE) is one of the more important hormones. It is involved in the fight-or flight response, where it increases heart rate, blood pressure, and blood flow to skeletal muscle.

3 0

3 years ago

How much bigger are eukaryotic cells than prokaryotic cells?

vaieri [72.5K]

In general, Eukaryotic cells are a fair bit larger than Prokaryotic cells (if you look at them under the microscope, you can generally see details inside Eukaryotic cells, whereas Prokaryotes are just tiny dots).

Prokaryotic cells are 0.2-2 uM (micrometers or 10^-6)
Eukaryotic cells are 10-100 uM

Give or take, eukaryotic cells are 50-100 times bigger than prokaryotic cells.

7 0

3 years ago

Read 2 more answers