Answer:
The correct answer is peas have characteristics that have two forms.
Gregor Mendel used pea plant <em>Pisum sativum </em>as a model plant for his experiments. There are many applications behind his choice, one of which is observable characteristics with contrasting traits.
Pea plant has many observable characteristics which exist in two forms for example:
- Plant size (tall or dwarf)
- Pea color (green or yellow)
- Pod shape (yellow or green)
- Flower color (purple or white)
- Pea shape (round or wrinkled)
Other benefits were like: short life cycle, it produces a good number of offspring in a cross, easy to breed or cross-pollinate, hybrids were liable, bisexual flowers which makes it easy to produce true-breeding etc.
<span> A scientific law always applies under the same conditions, and implies that there is a causal relationship involving its elements.</span>
The three domain system recognizes fundamental differences between the two groups of PROKARYOTES.
The three domain system refers to a biological classification, which divides all living organisms into three basic groups, which are: archaea, bacteria and eukaryotes. The system divides the prokaryotes into two groups, which are bacteria and archaea. These division was based on the differences in the 16S rRNA genes of these organisms. This system of classification was introduced by Carl Woese in 1990. The bacteria are made up of prokaryotes which lack membrane covered cell organelles while the archaea group is made up of prokaryotes which have a mono layer core of lipid in their membranes and specific nucleotide in their 16S RNA<span />
I only know 2 and 3 are correct. I’m not sure about the last one.