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san4es73 [151]
3 years ago
9

8. In the diagram below, which substance belongs in are: Z? Living Organisms include Chemical Compounds that can be Organic whic

h must contain Z Hydrogen 1) water 2) oxygen 3) nitrogen 4) carbon​

Biology
1 answer:
lbvjy [14]3 years ago
6 0

Answer:

Explanation:

D carbon

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You have a plant with yellow seeds, which express a dominant phenotype. How would you determine the plant's genotype? Conduct a
Archy [21]
The answer is <span>Conduct a test cross with a purebred recessive plant. 

</span>

Test cross is the cross between an organism with unknown dominant genotype and an organism with known recessive genotype.

<span>Since dominant trait results from a dominant allele, the test cross can determine if an unknown genotype is heterozygous and homozygous dominant. </span>

If A is dominant allele, and a is recessive allele, then AA is dominant homozygote, Aa is a heterozygote, and aa is recessive homozygote.

<span>According to the Punnett square, if all of the offspring are heterozygote (Aa), then unknown genotype is dominant homozygous (AA). If half of the offspring are the heterozygote, and the other half are recessive homozygote, then the unknown genotype is heterozygote (Aa).</span>

6 0
3 years ago
Scientists build models based on what they know from previous research to derive testable hypotheses. Independently, both Watson
Trava [24]

Answer:

Nitrogenous bases contain the genetic information, their amount is variable among different species, and the arrangement of these bases is also variable among different species

Explanation:

Both Watson-Crick and Pauling's DNA models considered that DNA nitrogenous bases (i.e., Adenine, Cytosine, Thymine and Guanine) contain the genetic information that determines the characteristics of living organisms. Moreover, both DNA models also considered that nitrogenous base composition varies between species, as well as the arrangement of these bases in the DNA chain also varies between species. Based on these features, Linus Pauling considered that a model where nitrogenous bases would be arranged on the outside of the DNA molecule would be easier for the DNA molecule to be replicated, transcribed, or repaired. Although incorrect, Pauling's DNA triple helix model was fundamental to develop the helical (double-stranded) structure of DNA, which was finally discovered by Watson and Crick in 1953.

5 0
3 years ago
two cats are mated. one of the parents cats is long haired(recessive allele). The litter which results contains two short haired
Mekhanik [1.2K]
The other cat has (I dont know what letters your using so I'm going to use 'c'.
The first genotype looks like this cc
the other Parent has to have a donomint trate as well as the recessiv Cc




7 0
3 years ago
9) How long was the Northeastern, United States blanketed by the ice sheet?
I am Lyosha [343]

Answer:

between c. 95,000 and c. 20,000 years

Explanation:

3 0
3 years ago
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