Index fossils delineate the epochs of geologic time. In
order for an organism to be considered as an index fossil it must possess at
least one of the four characteristics: it must be unique, extensive, abundant
and inadequate in geologic time. Most type of organism may be considered
distinctive but not widespread which tolerate them to inhabit all over the
world. While some are considered abundant that they were able to be developed as
the most susceptible to environmental modification and destruction. Just like
the trilobites, this is known as a precise example of index fossil for the
Paleozoic rocks that is inhabit in all parts of the ocean. They develop new
species throughout their being, which is according to some reports, lasted 270
million years from Middle Cambrian time to the termination of the Permian
Period. Because of their ability to travel, they tend to dwell in global areas.
The trilobites are huge that they can be used in a study even without a
microscope and they are also hard-shelled invertebrates which make them petrified
effortlessly.
Facilitated diffusion and active transport
<span>Facilitated diffusion is the movement of large particles (that cannot otherwise move across the cell membrane) from an area of higher concentration to an area of lower concentration with the help of trans-membrane proteins.</span>
<span>Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration using ATP energy. this may occur with large particles that cannot move across the cell membrane or small ones that can but don't due to the concentration gradient.</span>
Answer:
In reproductive or sexual cells
Explanation:
There are two principal types of cells in the organism: Somatic diploid cells (2n) that reproduce by the process of mitosis, and germ cells that are diploid reproductive cells in charge of gamete production. These germ cells suffer both mitosis (to form more sexual cells) and meiosis (giving place to haploid gametes: sperm and egg cells, through the gametogenesis process). Both somatic cells and germinal cells will end their cycle becoming two daughter cells with the same genetic dotation.
Gametes from each parent will merge in the process of fecundation, during which a new diploid cell called a zygote emerges through fertilization. The zygote is a complete cell from the structural point of view that suffers successive mitosis to form the new organism.
Any cell in the organism might suffer mutation.
- If the mutation occurs in the somatic cells, it will produce a population of identical mutated cells in that organism. However, this mutation in these cells is not inheritable. By definition, mutations in somatic cells do not inherit because these cells do not produce progeny.
- If the mutation occurs in the germinal line, in the germ cells, or the sexual cells, this <u>mutation will pass to the offspring</u>. The organism with mutated germinal cells might express a normal phenotype, but this mutation will be detected in the progeny.
Answer:
B.) High blood viscosity leads to slower blood flow.
Explanation:
:D
