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KatRina [158]
3 years ago
10

Most living things need oxygen to survive. These two body systems bring oxygen into your body and then move to all your body par

ts. What are these two body systems?
A) respiratory and muscular
B) digestive and circulatory
C) respiratory and digestive
D) circulatory and respiratory
Biology
2 answers:
Vikki [24]3 years ago
5 0
A is the answer i believe
Grace [21]3 years ago
3 0
Respiratory and digestive 
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the alleles are as follows;

L - lemons with bumpy fruit (dominant)

l - lemons with smooth fruit (recessive)

S - smooth leaf (dominant)

s - spiky leaf (recessive)

parents

one tree - lemons with smooth leaves and smooth fruits

<span>one tree - lemons with spiky leaves and bumpy fruits </span>

if parents show recessive phenotype , this means that the genotype should be recessive homozygous - ll / ss

if parents show dominant phenotype genotype is dominant homozygous or heterozygous

<span>parents    -                 S_ ll           x          ssL_</span>

<span>f1generation-</span>

<span> bumpy fruits with smooth leaves - SsLl </span>

<span>bumpy fruits with spiky leaves - </span>ssLl

<span>since offspring are bumpy fruits it should either be Ll /LL, but one parent is ll therefore for the offspring to be Ll/ll the other parent should have homozygous LL. Then the offspring will be heterozygous for fruits</span>

<span>offspring have both spiky leaves - ss and smooth leaves Ss. for offspring to have heterozygous and homozygous both, since one parent is already homozygous, the other parent should have heterozygous alleles- Ss</span>

<span>the parents genotypes are Ssll and ssLL  </span>

<span>             </span>
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I go with Ice Core examples since early sociteties probably didn't have Written Records or maps, and tree rings would only tell if they were fossilized. I hope this helped :)
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