Answer:
A.a woman heterozygous for hair curl, a man heterozygous for hair curl will produce 25% straight hair, 75% curly hair
Explanation:
a woman heterozygous for hair curl, a man heterozygous for hair curl will produce 25% straight hair, 75% curly hair
using C as the allele for hair curl:
Cc x Cc will produce the following genotypes: CC, Cc, Cc, cc
25% will be homozygous dominant (curly hair)
50% will be heterozygous (curly hair)
25% will be homozygous recessive (straight hair)
combine the curly hair genotypes since the question asked about phenotypes which results in 75% curly and 25% straight.
Most scientists believe that for half of Earth's 4.6-billion-year history, the atmosphere<span>contained almost no </span>oxygen. Cyanobacteria or blue-green algae became the first microbes to produce oxygen<span> by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.
this answer came from this website </span>The Rise of Oxygen - Astrobiology Magazine<span>www.astrobio.net/news-exclusive/the-rise-of-oxygen/
it should help</span>
I would say the answer is false because they also used information of science to help make things like medicine and fungi and fossils, one of the main things science was used for was chemistry and physics to determine what things could kill humans in the world back in the day.
Hope this helps, Have a good day:), ~Nana!~
Answer:
by the process of photosynthesis
