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dezoksy [38]
3 years ago
8

The sides of the DNA molecule, the rails of the ladder, are composed of

Biology
1 answer:
svp [43]3 years ago
6 0
The correct answer is C.

Glad i could help:)
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4. How do the finches on the different Galapagos Islands differ from each other?<br> Explain why.
kenny6666 [7]
On the Galapagos Islands, Darwin also saw several different types of finch, a different species on each island. ... Finches that ate small nuts and seeds had beaks for cracking nuts and seeds. Darwin noticed that fruit-eating finches had parrot-like beaks, and that finches that ate insects had narrow, prying beaks.
6 0
3 years ago
Hemophilia and colorblindness are both X-linked, recessive traits. A hemophiliac woman marries a colorblind man. Assume that bot
Gre4nikov [31]

Answer:

Normal daughters and Hemophiliac son

Explanation:

Females exhibit hemophilia and colorblindness in homozygous genotype only.  

The genotype of hemophiliac woman= X^hX^h

The genotype of colorblind man= X^cY

A cross between X^hX^h and X^cY would produce progeny in the following phenotype ratio= 1 Normal but carrier daughters:1 Hemophiliac son

4 0
3 years ago
Which form of succession replaces<br> an<br> existing system after a calamity?
lina2011 [118]

Answer:

Secondary succession

Explanation:

Ecological succession is the term used to describe any series of change in the composition of an ecosystem over a particular period of time. Ecological succession is made up of two types viz: primary succession and secondary succession.

Primary succession involves the formation of a brand new ecosystem by the colonization of a barren area of land e.g bare rock, where no life existed. Secondary succession, on the other hand, is the recolonization of an area by a new set of organisms because the previously existing organisms have been wiped out by certain disasters e.g fire outbreak, hurricanes etc. In secondary succession, there is soil, which makes it possible for new organisms to sprout quickly after the calamity.

Example of secondary succession is when a fire outbreak burns the organisms in a community, allowing the root of grasses to sprout after.

5 0
3 years ago
Applying Ideas Insect bites hurt because the
Phoenix [80]

Answer:

Treating the affected area with an alkaline solution or substance such as baking soda.

Explanation:

Neutralization Reaction:

  • When an acid and an alkali react chemically, they form water and a corresponding salt. This reaction called the neutralization reaction.
  • acid + base (alkali) → salt + water
  • E.g HCl + NaOH → NaCl + H2O
  • The formic acid that the ant injects can be neutralization by application of an alkali.
  • In order to prevent a serious allergic reaction, antihistamines must also be administered.
4 0
3 years ago
Explain how the water vascular system allows an echinoderm to move along the ocean floor. Please help!
astra-53 [7]

Answer: Sea stars move using a water vascular system. Water comes into the system via the madreporite. It is then circulated from the stone canal to the ring canal and into the radial canals.

Explanation: The radial canals carry water to the ampullae and provide suction to the tube feet.

3 0
3 years ago
Read 2 more answers
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