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Leto [7]
3 years ago
6

Carotenoids are red, orange, or yellow pigments found in many plants. We know that plants contain chlorophyll a and b. What is t

he benefit of having multiple pigments within the leaves of plants?
Biology
1 answer:
sweet-ann [11.9K]3 years ago
8 0
Multi color plants and flowers have a benefit since some predators did not like certain colors, also, when they are trying to reproduce the colors attract pollinators.  
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No no no no no no 44444444
german

please post the understandable question

6 0
3 years ago
natalizumab treatment 28 days after infection led to stabilization of neuronal injury, reduced numbers of monocytes/macrophages,
seropon [69]

The discussion of natalizumab treatment 28 days after infection led to stabilization of neuronal injury, reduced numbers of monocytes/macrophages, and reduced productive infection is given in below paragraph-

HIV peripheral neuropathy's pathogenesis depends on the flow of activated monocytes into the dorsal root ganglia (DRG). In SIV-infected macaques, we have demonstrated that increase of freshly recruited (bromodeoxyuridine+ MAC387+) monocytes is linked to severe DRG pathology and loss of intraepidermal nerve fibers. Here, we used natalizumab, which binds to 4-integrins, to treat mice to prevent leukocyte flow. When natalizumab was administered either early (the day of infection) or late (28 days after infection), SIV-infected CD8-depleted macaques were compared to untreated SIV-infected animals slain at comparable dates.

Histopathology revealed diminished DRG pathology with natalizumab therapy, including diminished neuronophagia, inflammation, and Nageotte nodules. When given natalizumab, DRG tissues had less bromodeoxyuridine+ (early), MAC387+ (late), CD68+ (early and late), and SIVp28+ (late) macrophages. Natalizumab treatment had no impact on the quantity of CD3+ T cells in DRGs. All mice given natalizumab experienced decreased levels of the adhesion molecule vascular cell adhesion molecule 1, which regulates leukocyte flow. These results indicate a role for monocyte traffic and activation in HIV peripheral neuropathy by demonstrating that restricting monocyte traffic to the DRG, but not T lymphocyte traffic, reduces inflammation and disease.

<h3>What are macrophages?</h3>

Macrophages are a specific type of white blood cell that surround and eliminate pathogens, clear away dead cells, and activate other immune system cells.

To learn more about macrophages with the help of given link:

brainly.com/question/815350

#SPJ4

4 0
1 year ago
Compare &amp; Contrast the 4 parts of Evolution and the 3 "Ingredients" of Natural Selection."
Klio2033 [76]

The four parts of evolution are variation, inheritance, selection, and time.

The three ingredients of natural selection are variation, consequences, and heritability.

Explanation:

Parts of evolution:

  • Variation denotes the uniqueness in genetic makeup which leads to physical differences among different species and within species. Like in a species of butterflies, variations in body size, color, feathers can be observed.
  • Inheritance refers to the genetic material passed from the parents to the offsprings. These are specific phenotypes like color of skin or hair, shape of nose etc.
  • Selection includes inheritance and acquiring of certain phenotypes to adapt and survive better, reproduce offsprings. These new offsprings in turn produce new offspring with those phenotypes and result in the entire population.
  • Time decides about the various changes and adaptations in species. Certain evolutions like that of whale happened millions of years ago; however, the numerous viruses have evolved recently.

In natural selection,

  • Variation is the change in the individual traits.
  • Consequences are adaptation of certain traits by individuals which makes them to be better to survive and reproduce
  • Heritability refers to the resemblance of the offspring to their parents.
3 0
3 years ago
Two organisms have analogous structures. A student concluded that these organisms must have a common ancestor is the student cor
arsen [322]

Answer:

The student is wrong, just because the analogous structures of any two organism may have the same structure or even have the some relation between there way of operation or functions.

Explanation:

  • <u>Analogous Structures:</u>

As the similarity between two or more different organisms structure or any organ does not means that they have same ancestors or have the common origin from which the evolve into two different species. Now analogous structures are very much similar in there structure physically, but two different organisms may use them for the same function, which is astonishing to see or observe in way different species.

  • <u>For example:</u>

As the structure of the flipper of a Dolphin has similarity with the phalanges of a human being and with the wings of the bat. As all of them functions for the basic need of movement or locomotion from one point to another. While, all the three species are very much different in there features and are not the same obviously.

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4 0
3 years ago
explain how a toxin in a food web will harm some while killing others why did the mosquito and cats die while other things lived
vladimir1956 [14]
I think that a toxin that was introduced into a food web can kill some species but not others because some may have resistances to the toxin, while others, it may be lethal. Also that it did not affect everyone because as Bioaccumulation has stated if affected one organism but their might not be much biomagnification as in much increase in the correlation between the food chains in that area. i think the cat were like the top animal so the key stone animal of the food chain and also it had no predators. 
4 0
3 years ago
Read 2 more answers
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