Answer:
A) Cell
Explanation:
its the smelliest thing, only visible under a microscope.
A, flask 2 disproved spontaneous generation because of the shape of the container. B, flask 3 because the flask is open
Naturalists would suggest that it is important to plant more trees so
that we can avoid the effects that come alongside deforestation such as
soil erosion and high levels of ozone. It is important not to
underestimate the positive effect that trees have on the environment, in
fact one tree can actually release enough oxygen to provide for two
people over the course of their lifetime.
Answer: Tetrapods
Explanation:
Tetrapods are the most recent common ancestor with the lungfish look like.
Ancient species of lung fish are the ancestors of tetrapods. These fish may live on land, breathing air and being propelled by their pelvic fins. Australia has three populations of the few remaining lungfish — two marine populations and one inhabiting the Mary River basin in Queensland.
Hence, tetrapods are most common ancestors with lung fish.
The correct answer is: a gene may represent only a millionth of the cell's DNA.
The method used to amplify DNA fragments is called polymerase chain reaction (PCR). PCR is a technique used in molecular biology to produce thousands to millions of copies of a single targeted DNA sequence. When studying a specific gene, the scientist needs to be able to target and focus only on the DNA sequence which constitutes this exact gene. However, a gene is only a very small portion of an organism's genome. Therefore, the scientist uses PCR to amplify this DNA sequence and produce a large number of copies.