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Shkiper50 [21]
3 years ago
15

suggest two ways in which human activities contribute to an abnormal rise in levels of atmosphere carbon dioxide​

Biology
1 answer:
WARRIOR [948]3 years ago
6 0

Answer:

Consuming electricity and Transportation

Explanation:

Consuming electricity: Burning fossil fuels emits CO2, with coal releasing twice as much of the gas as petroleum.

Transportation: Whether for business or pleasure, locomotion is the second largest source of U.S. CO2 emissions.

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A template dna strand contains the sequence 3'-atgctgac-5'. the corresponding sequence in the rna transcript is:
V125BC [204]
The corresponding sequence in the RNA transcript is 5'-UACGACUG-3' . One of the differences between DNA and RNA is the fact that the RNA contains the base uracil instead of thyamine. The base pairing occurs between A and T, and G and C. DNA undergoes the process of transcription in the nucleus to generate RNA, which then undergoes translation (for mRNA) in the cytoplasm to yield proteins. 
5 0
3 years ago
At a basic level mitosis and meiosis are similar processes. However, they have very different outcomes. Which of the following s
Dafna1 [17]

Answer: C. Homologous chromosomes are separated in meiosis but not in mitosis.

Explanation: There are two main types of division that take place in eukaryotic cells, mitosis, and meiosis. Mitosis is the type of division that is used for growth, repair, and replacement of tissues. Therefore it is not necessary that the cells have  different chromosome numbers or are varied genetically in the daughter cells in the case of mitosis.

Meiosis is the division that takes place to form the gametes for sexual reproduction. It is important in the first stages of meiosis I, to introduce variation and to halve the chromosome number.

Chromosomes numbers are halved (from 46 to 23) during meiosis I because the gametes (sperm and egg) come together and fuse during fertilization to form a zygote. When this fusion occurs (23 from the zygote and 23 from the egg), the chromosome number needs to be returned to that of the parent cell (46).

<h2>Genetic variation is introduced during synapsis which only occurs in meiosis, not mitosis. Homologs exchange genetic information during crossing over of synapsis. Entire chromosomes also separate during meiosis I. </h2>

At the end of meiosis, four genetically unique cells are  produced with half the number of chromosomes as the parent cell (23 cromosomes) . After the process of mitosis is completed, two cells genetically identical to each pther are produced and have the same number of chromosomes as the parent cell (46 cromosomes).

Genetic variation is actually important because of changing environmental conditions.

6 0
3 years ago
Babies at high risk for stunted growth, poor health, and impaired functioning throughout life are dealing with the results of
Elodia [21]
<span>Malnutrition. Malnutrition refers to deficiencies, excesses or imbalances in a person's intake of nutrients. The baby is not getting a balanced diet to meet its bodily needs, and that's why the baby is at high risk of the mentioned above. If a child is undernourished, especially below 2 years of age, it may result in permanent problems with physical and mental development, and since early childhood is an important period for cognitive, behavioral, and physical development, a nutritious diet is the most important factors for ensuring a child reaches optimal development.</span>
7 0
3 years ago
Why do fish have gills​
Marta_Voda [28]

Answer: Like us, fish also need to take in oxygen and expel carbon dioxide in order to survive. But instead of lungs, they use gills. ... As the fish opens its mouth, water runs over the gills, and blood in the capillaries picks up oxygen that's dissolved in the water.

4 0
2 years ago
If the two traits that Mendel looked at in his dihybrid cross of smooth yellow peas with wrinkled green peas had been controlled
nalin [4]

Answer:

c. Would have deviated from the 9:3:3:1 phenotypic ratio

Explanation:

<em>If two genes are linked together on the same chromosome, the phenotype of the F2 generation would have deviated from 9:3:3:1.</em>

Two genes whose loci are close on the same chromosome are said to be linked. Linked genes have higher frequency of recombination than genes that are not linked.

<u>Hence, while genes that are not linked assort independently to produce 9:3:3:1 phenotypic ratio at F2, linked genes do not assort independently and the higher frequency of recombination ensures that they standard phenotypic ratio is deviated from.</u>

The correct option is c.

3 0
3 years ago
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