Answer:
you want us to answer ALL those questions , cause that's alot lol but its okay if so .....
<span>This is due to much of the energy that is consumed by lower trophic levels of the food chain/food web being used at that lower level. This energy is stored or used and, therefore, unavailable to the organisms higher up in the chain. As the chain lengthens, less energy is available, usually as a factor of 10 (1/10 of the energy taken in by the level below the consumer is available to the consumer's level, for example).</span>
In short, because the UV rays damage skin cells, which increases the risk of a mutation possibly leading to skin cancer.
Hope this helps.
Answer: Rare X-linked recessive
Explanation:
In humans our biological sex-determination is based on a pair of sex chromosomes namely, XX in females, XY in males. The genes on our X chromosome are X-linked. and have special patterns of inheritance due to their presence in contrasting numbers in males (XY, 1 X chromosome) and females (XX, 2 X chromosomes); thus they are more common in genetic males.
The observed trait is X-linked, and given that only half the sons are affected, the trait is recessive and carried by the heterozygous mother -heterozygous alleles are two variants of the allele at the same gene locus. The Y chromosome inherited from the father does not carry the gene, thus there is no normal copy available. The incidence for its inheritance is at 50% as the mother has two X hromosomes, one normal, and one carrying the trait.
Answer:
true
Explanation:
the oxygen-poor blood needs to be brought to the lungs to be oxygenated so that it can be sent to the heart so that way it can be distributed through out the rest of the body
