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Arturiano [62]
3 years ago
11

Could someone please help?

Biology
2 answers:
amm18123 years ago
5 0

My favorite animal is the Arctic fox it has very small ears because with big ears very much heat is lost so the small ears cause the fox to lose less heat.

Vesnalui [34]3 years ago
4 0

Answer:

Explanation:

 Mangrove is a coastal ecosystem that occurs in the transition between land and sea in tropical and subtropical regions of the world, occupying environments flooded by tides such as estuaries, coastal lagoons, bays and deltas. These environments are not necessarily characterized by the mixture between fresh and salt water. The plants that make up the mangrove and dominate the landscape of this ecosystem are the mangroves.

 There are adaptations that promote mangrove plants to survive in this very different place and they are: air roots so that they can breathe and exchange oxygen, because de soil has a less quantite about oxygen; there are glandules in its leaves to eliminate the large amount of salts and it is called halophytes; the seeds still germinate attached to the mother plant and are released at a stage of development called the propagule. The propagules accumulate a large amount of nutritional reserves, which allows their survival until they find a suitable place for their fixation.

  These are some adaptations that we have on a mangrove ecosystem and it's an important ecosystem that there are so many species like crabs, fishes and a wide variety of animals and food for other animals. But unfortunately this paradise is disappearing and being destroyed by man.

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Answer:

A - 3:1

Explanation:

In order to determine what number of offspring will have attached earlobes, we must make a Punnett table. We know that attached earlobes are the dominant gene, and we know unattached earlobes are recessive.

| P | p

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1. Key Concept List the
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<h2>DNA </h2>

Explanation:    

1) Experiment done by Griffith:

  • Griffith used two related strains of bacteria, known as R and S
  • R bacteria were nonvirulent, meaning that they did not cause sickness when injected into a mouse whereas mice injected with live S bacteria developed pneumonia and died
  • Griffith tried injecting mice with heat-killed S bacteria (that is, S bacteria that had been heated to high temperatures, causing the cells to die), the heat-killed S bacteria did not cause disease in mice
  • When harmless R bacteria were combined with harmless heat-killed S bacteria and injected into a mouse, not only did the mouse developed disease and died, but when Griffith took a blood sample from the dead mouse, he found that it contained living S bacteria
  • Griffith concluded that the R-strain bacteria must have taken up what he called a transforming principle from the heat-killed S bacteria, which allowed them to transform into smooth-coated bacteria and become virulent

2) Experiment done by Avery:

  • Avery, McCarty and MacLeod set out to identify Griffith's transforming principle
  • They began with large cultures of heat-killed S cells and, through a long series of biochemical steps progressively purified the transforming principle by washing away, separating out, or enzymatically destroying the other cellular components
  • These results all pointed to DNA as the likely transforming principle but Avery was cautious in interpreting his results
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3) Experiment done by Hershey and Chase:

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  • Hershey and Chase concluded that DNA, not protein, was injected into host cells and made up the genetic material of the phage

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