Answer:
D. She doesn't consider phosphorous to be a Green house Gas.
Explanation:
- Green house gases are major cause of air pollution today.
- They are becoming a big concern day by day.
- These gases are contributing to overall rise in Earth's temperature leading to Global warming.
- Mary is campaigning to improve air quality.
- Phosphorus is not a gas and is not considered as a significant air pollutant.
- But Carbon dioxide and Methane are reported to be significant green house gases in atmosphere.
- So, Mary is very much concerned about Carbon dioxide and Methane Outputs.
Answer:
Hemophilia is a X-linked recessive disease. Tim is not correct in his thinking because he can not pass the condition to his son. Only mother can pass it to sons since they get X chromosome from the mother. Father gives Y chromosome to sons which does not carry the hemophilic gene.
Tim and Stephanie's son can be hemophilic even when neither of the parents are hemophilic. In this case, Stephanie must be a carrier i.e. heterozygous for the trait.
Tim : XHY (normal)
Stephanie : XHXh (normal but carrier)
Their children:
XH Y
XH XHXH XHY
Xh XHXh XhY
As clear by the punnett square, all the daughters will be normal (half will be carriers like Stephanie). Half of the sons will be normal (XHY) and other half will have hemophilia (XhY).
The reason chameleons change color is to allow them to camouflage where ever they are so that they can hide better from predators.
Vertebrates have a back bone. They have living endoskeleton, pharnyx and efficient respiration, advanced nervous system, and paried limbs.
