Answer:
The false statement is
D. Genetic disorders cannot be caused by changes in just one individual gene.
Explanation:
Genetic disorders are caused by changes in DNA sequence due to mutation which will result in protein alteration which causes different disorders
Not only in gene, a change in single nucleotide or deletion of single nucleotide in the DNA sequence can cause a genetic disorder.
Answer:
B. Australia is isolated
Explanation:
They originated in South America and spread throughout the world, but due to competition on other continents, the other marsupials died out, while the ones on Australia lived.
Answer:
DNA: TACCGAATTCGC
mRNA: AUGGCUUAAGCG
RNA: A=U, T=A, G=C
RNA contains Uracil and Thymine is no longer present
Answer:
The hydrogen bonds of water expand during the freezing process, creating more volume and decreasing density of the ice.
Explanation:
Water has awesome properties that distinguishes it among all other substances, many of which is attributed to its hydrogen bonding. Liquid water contains hydrogen bonds that holds tightly its molecules. However, when this liquid water freezes, the hydrogen bonds between its molecules break and expands. This creates space for the water molecules to occupy as it turns to its solid form (ice).
This is the case of this ice-covered lake. The ice, when it sinks, causes the liquid water beneath to freeze because the hydrogen bonds between the water molecules are being expanded enabling the molecules to occupy more space (volume) and make it less dense than liquid water (decreased density).
