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DanielleElmas [232]
3 years ago
8

Peppered moths come in two colors, black and white. What did Kettlewell show, with regard to peppered moth populations and tree

coloring? (Recall that England at the time was heated mainly by coal in urban areas.)
Biology
1 answer:
Arlecino [84]3 years ago
5 0
Pollution caused the environment to become more darkly colored, so moths were selected to be blacks and greys.  Before pollution they were white and lighter colors.  <span />
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Which element provides strength to the exoskeletons of clams and oysters?
Allisa [31]

Answer:

phosphorus

Explanation:

Since Phosphorus is an essential component of phospholipids, nucleic acids, phosphoproteins (casein), high energy phosphate esters (ATP), hexose phosphates, creatine phosphate, it also provides strength to the exoskeletons of clams and oysters.

7 0
2 years ago
Based on the data in Table 1, identify the animal that has the greatest number of sequence differences from the reference animal
Doss [256]

Answer:

( please like and hope it helps)

A) Elephas-2 has 13 sequence differences from the reference animal, and this is the greatest number of animals in the table.

B) From left to right, the order at the tips of the cladogram is: Dugong , Elephas , Loxodonta , Mammathus.

(Loxodonta and Mammuthus can also be reversed)

C) The molecular data, such as that for are widely conserved protein such as cytochrome b , show conserved similarities between organisms such as to dugongs and proboscideans and can be used to support the existence of this relationship.

D) The animals that are related ones had a common assister with certain genetic characteristics. Adaptation to different habitats leads to diversification of morphology but does not change evolutionary relationships.

4 0
3 years ago
You have been assigned to care for Jim. He is 29 years old and has been diagnosed with Schizophrenia. Jim has been prescribed ch
Digiron [165]

Answer and Explanation:

My first response would be that it is not a good strategy to speculate things negatively in the very begining even when you have not tried it. We can definitely go for alternative drugs in case it doesn't fit to Jim's metabolic functioning and physiology. However, it is also possible that the drug would help Jim. Everybody is different when it comes to side effects of a particular drug. Some people even don't show any side effects for one particular drug whereas others show mild or significant concerns. Therefore, I would suggest her to reconsider her decision and try chlorpromazine as prescribed. After all, it is Schizophrenia and you cannot simply ignore it. Such negligence could worsen the situation for Jim and you all.

4 0
3 years ago
"DNA denatures at a higher temperature than does protein, yet its structure depends on relatively weak hydrogen bonds. Why the d
Reika [66]

The option are not given and the options are:

Proteins are denatured by breaking covalent bonds.

Linear molecules like DNA are inherently stable.  

Individual hydrogen bonds may be weak, but DNA structure is stabilized by many thousands or millions of these bonds - far more than found in proteins.

The statement is incorrect; it actually takes far more energy to denature proteins than it does to denature DNA.

Answer:

The correct answer is- Individual hydrogen bonds may be weak, but DNA structure is stabilized by many thousands or millions of these bonds - far more than found in proteins.

Explanation:

Proteins become denatured when it looses its three-dimensional structure. Disulfide bond and hydrogen helps in stabilizing the three-dimensional structure of proteins and if these bonds break due to any factor protein lost its structure and function.

DNA is made up of a large amount of hydrogen bond because in AT base-pairing two hydrogen bonds are required and in GC base pairing three hydrogen bonds are required. Therefore it can be concluded that as more hydrogen bonds stabilizes DNA than protein its melting temperature is higher than protein.

3 0
3 years ago
Is reproduction important to the survival of the survival of an individual
zimovet [89]
Very... Reproduction at both the molecular level to help maintain and repair itself through production of cells is important for self-preservation. Additionally reproduction allows survival of genetic material to offspring. 
3 0
3 years ago
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