Answer:
(B) resemble structures formed by bacterial communities that are found today in some shallow marine bays.
Explanation:
Extant stromatolites represent real "living fossils" for they are decendents of ancient forms that are associated with one of the first living forms on earth. Particularly, stromatolites are real bacteria communities where the autotrophic organism of the community are represented by cyanobacteria, which live along with heterotrophic bacteria. This clearly indicates that fossilized stromatolites points to bacteria (prokaryotes) as the first living things on earth (dated with not less than 3.5 billion year old)
Nowadays, stromatolites with cyanobacteria allows to reconstruct and understand fossilized forms. These current structures live in shallow marines ambients (e.g. Australia) but also in continental salt flats (e.g. Argentina) where few others bacteria can survive to these extreme conditions (high light exposure and salt concentration).
The answer is one trait. In Codominant alleles, neither allele is dominant over the other. Both alleles are expressed equally hence no recessive or dominant phenotypes. An example of that of fur color in rabbits where one parent with black fur color and the other with white fur color will produce offspring of black and white fur color. This should not be confused with incomplete dominance whre the two alleles blend in phenotype.Example of incomplete dominance is a parent with straight hair in humans and another with curled hair will produce wavy hair offsprings.
Answer:
An organism is able to produce sweat so that it cools off which helps it to cool down when exposed to high temperatures.
It's vessels are able to vasodilate and vasoconstrict to regulate temperature.
An organism stores fat as an insulator.
Eye pupils dilate and constrict to control the amount of light entering the eye.
If an organism touches a hot surface, nerve impulses are sent to the body to move and not get injured.
In a nutshell: an organism maintain a constant internal environment with homeostasis. And is able to respond to changes in the atmosphere by electrical impulses (nervous system) or the endocrine system by the release of chemicals (called hormones)
Answer:
There are two main types of stem cells: embryonic stem cells and adult stem cells.Stem cells provide new cells for the body as it grows, and replace specialised cells that are damaged or lost. They can divide over and over again to produce new cells.
The blood protein that binds covalently to multiple fatty acids which are carried to the parts of the body is the erythrocyte or the red the blood cells. These cells bind with fatty acids in order to be easily transported to the heart, the skeletal muscles and the renal cortex.
