Answer:
the petrified log looks like the original tree.
Explanation:
A tree to be petrified first needs to be buried. An element laying on the surface can not be petrified because it is exposed to many different factors (such as<em> organisms, microorganisms, climatic conditions</em>, etc.), that affect the petrification process. So, in the case of a fallen tree, first, it needs to be covered by many sedimentary layers. Once it is underground, it also needs the presence of underground water and minerals. Water replaces the original organic material with minerals (silica, calcite, and pyrite). This replacement process results in the conversion of the woody material into a fossil of the original material. Very often, the tree details are so preserved that the fossil looks exactly like the original trunk.
Depending on the preservation degree, a fossil can be useful for different studies about the past.
Answer: Complete dominance
Explanation: complete dominance occur when a dominant allele in heterozygous form completely mask the effect of the recessive allele.
For example a situation where Tt having two allele and allele T for tallness is dominant over t for shortness making the plant phenotype a Tall plant. This is called complete dominance.
A condition when the heterozygous allele do not completely expressed itself over the recessive allele is called Incomplete dominance.
For the plant to have a pigmented color in an heterozygous form the allen M for pigment is completely dominant over allele m for albino.
It is important because you need vitamins and minerals from them e.g. Scurvy no vitamin c
Answer:The answer is option A sister chromatids are separated from each other to form gametes.
Explanation:
Meiosis is a type of cell division which produces 4 daughter cells with different genetic material. The ploidy number or set of chromosomes is reduced to half in the newly formed daughter cells.This process usually proceeds in two divisions-meiosis I and meiosis II with four stages in each division which are prophase, metaphase, anaphase and telophase.Sister chromatids separate from each other during anaphase II of meiosis II which produces four haploid gametes from two intermediate cells formed by meiosis I.Thus, sister chromatids are separated from each other to form gametes is the correct answer.
The answers are: condense; visible
Explanation:
In Prophase I, the chromosomes condense and become visible.
