There are so many examples for that in different areas, like steroidal compounds experiment carried out in our lab recently.
Here's one link: http://www.alfa-chemistry.com/products/steroidal-compounds-8.htm
Answer:
False
Explanation:
It is found that birds have evolved in the Mesozoic Era from a a group of theropod dinosaurs. the most close relative of modern day bird was supposed to be a primitive bird known as Archaeopteryx. In a recent study conducted by UCMP Berkeley, birds have common ancestors from the theropod lineage. More specifically, lizard-hipped dinosaurs are ancestors of birds.
Hence, the given statement is false
Answer: effects of the evolution of photosynthesis. Photosynthetic organisms dramatically increased atmospheric oxygen levels between 2 and 2.5 billion years ago. This change created selective pressure favoring organisms that used oxygen to produce energy-containing molecules.
change the wording a little bit.
Explanation:
The correct answer is B. Each of the claimants or their living children.
Explanation:
One of the basic principles in genetics establishes genes are passed from the parents to their offspring. Indeed, children receive 50% of genes from each parent. This implies the daughter of the tsar and tsarina will have share part of the DNA including mtDNA (mitochondrial DNA) of her mother, father, and siblings.
According to this, to prove if someone is Anastasia or not, it is possible to use the mtDNA sample from the tsar, tsarina, or death children but not from the claimants. This is because the claimants are not confirmed relatives of the tsar or the tsarina, and therefore their DNA cannot be used to determine if a woman is the daughter of the tsar and tsarina. Indeed, a woman claiming to be Anastasia can share DNA with another claimant and this does not prove they are related to the tsar and tsarina or that the woman is the real Anastasia.
Mutualism and commensalism
