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inysia [295]
3 years ago
8

What is the definition of spiral density wave?

Biology
1 answer:
aleksandrvk [35]3 years ago
3 0
Theory proposed by C.C. Lin and Frank Shu in the mid-1960s to explain the spiral arm structure of spiral galaxies
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Consider the parts of a polar ecosystem and a desert ecosystem.
g100num [7]

Answer: Abiotic factor for polar: Ice

Abiotic for desert: Sand

Biotic for polar: Polar bears

Biotic for desert: Cacti

The types of factors are different because there are different set conditions for each ecosystem. A cactus is built for it's hot, dry ecosystem. If it were to move to a polar ecosystem it would not survive there. Same for the polar bear. It's built for polar regions. It has white fur to blend with the white ice to help it blend in and it's adapted to swim to get it's food source.

Explanation:

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3 years ago
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How are they different?<br> Giraffe
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Seven other species are extinct, prehistoric species known from fossils. The giraffe's chief distinguishing characteristics are its extremely long neck and legs, its horn-like ossicones, and its distinctive coat patterns. It is classified under the family Giraffidae, along with its closest extant relative, the okapi.

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What does each mrna molecule that goes to the ribosomes dictate
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mRNA or messenger RNA goes to ribosomes to dictate the genetic information that it contains .

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Ribosomes act as work benches during protein biosynthesis.mRNA also called messenger RNA binds with the smaller subunit of ribosome at the time of translation.

       The bound subunit of ribosome reads the genetic information as codons containing three concecuetive nucleotides present in mRNA thus helping tRNA to bring the particular amino acid specific for that codon at the A site or attachment site of ribosome.

      Thereafter ribosome moves to the next codon to bring another amino acid and so forth.

       Thus mRNA helps ribosome to brings the amino acids at the translation site.

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The final stage of the cell cycle is
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Cytokinesis

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Select the correct answer. Claire, an ecologist, is finding it difficult to identify an interaction in nature because of changin
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e

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