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iren [92.7K]
3 years ago
10

I WILL GIVE 20 EXTRA POINTS!!

Biology
1 answer:
mariarad [96]3 years ago
4 0

Answer:

Due to DDT ban

Explanation:

DDT is an pesticide or insecticide which got banned because of its harmful effect in environment.

According  to the graph the eggshell of both the bird species A and B are thick in 1930 but begin to thin after 1940 as DDT (Dichlorodiphenyltrichloroethane) introduced in the ecosystem.

Eggshell return to their original thickness by 1980 because DDT got banned after 1970. DDT is a harmful pesticide which alter the bird's calcium metabolism which leads to thin eggshells.

Hence, due to banning of DDT after 1970,egg shell of either species return to their original thickness by 1980.

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In your opinion which type of source will be most common in the future choose the following explain why
tiny-mole [99]

In my opinion, <u>natural gas</u> is a source that will be most common in the future. Considering that natural gas is a fossil fuel that is used as a source of energy for heating, cooking, and electricity generation. It is also used in stoves, ovens, clothes dryers, lighting fixtures and other appliances that are used and needed in everyday life. Imagine a life without natural gas. We wouldn't be able to heat our homes, cook our food, etc.  

7 0
3 years ago
What is pollination? Identify three ways pollen can be transferred. How is cross-pollination different
Stells [14]

Answer:

The transfer of pollen to a stigma, ovule, flower, or plant to allow fertilization. It can be transferred by things that feed from what has pollen. Self-pollination occurs when the pollen from the anther is deposited on the stigma of the same flower, or another flower on the same plant. Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of another flower on a different individual of the same species.

3 0
3 years ago
In a flowering plants species, red flower color is dominant over white flower color. What is the genotype of any white-flowering
katovenus [111]

Explanation:

<u>C. A red allele is present on both homologous chromosomes</u>

<u></u>

Homologous chromosomes are pairs of chromosome of similar lengths, banding patterns, and centromere positions, with genes at the same loci. For dominance, gene copies are present on both of the chromosomes; the dominat variant overrides the effect of the other recessive allele.

Further Explanation:

DNA molecules contain chromosomes that may have different forms called 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 alleles, impacting the associated mRNA, and thus the encoded protein.

Homozygous individuals have a chromosome containing two variants of the same allele. Dominant homozygous individuals bear two copies of the dominant allele, whereas recessive homozygous individuals hold two copies of the recessive allele.

 

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

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

#LearnWithBrainly  

6 0
3 years ago
Density is a measure of an objects per unit
Kisachek [45]
Density is mass of object per unit volume
4 0
3 years ago
Read 2 more answers
Tyra made a mistake while she was creating her chart. Which best identifies the mistake Tyra made?
Verizon [17]
<h2>Answer:</h2>

The mistake made by Tyra is identified as personal error.

<h3>Explanation:</h3>

When an experiment is performed, the results which came in the final step or after interpreting experiment results are not 100% correct results.

Because there are many types of errors which can influence an experiment result like an instrumental error, personal error/human error.

The personal error is the error in measuring results or interpreting the results by the scientist due to some reasons like attention deviation or inability to take accurate measuring.

7 0
3 years ago
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