2(6)+1 is the answer
Which of the following animals has fur that changes color with the season? a. polar bear
b. arctic fox
b. arctic fox
Arctic fox are animals that are adapted to change their fur color during the various seasonal changes. Adaptations are the result of evolution in different living organisms. This process occurs amazingly through gene mutation but it takes a very long period in time. Adaptation processes occur to help species survive and thrive in the ecological balance of life. Structural adaptations are physical features of an organism that adapted through time.
Which function correctly relates with the type of tissue? A. contraction of the heart : skeletal muscle tissue
B. constriction of blood vessels : voluntary muscle tissue
C. insulation of the body : nervous tissue
D. stomach acid secretion in the digestive tract : epithelial tissue
In the --- eon prokaryotes still dominated the worlds living things Paleozoic Proterozoic Phanerozoic none of the above
The correct answer is none of the above.
It is in the Archean Eon that the prokaryotes dominated the world's living things. It is earlier of the two formal divisions of Precambrian time, that is, about 4.6 billion to 541 million years ago, and the period when the life initiated on Earth.
The Archean Eon started about 4 billion years ago with the creation of Earth's crust and prolonged till the beginning of the Proterozoic Eon. The fossil proof of the primitive life forms, that is, prokaryotic microbes from the domain Archaea and bacteria appeared during this time.
During the Archean Eon, life initiated and was subjugated by the one-celled prokaryotic life forms.
The Proterozoic Eon occurred from 2.5 billion years ago to 544 million years ago. The characteristic event of the Proterozoic Eon was origin of simple eukaryotes around 1.5-1.2 billion years ago. Before evolution of eukaryotes, the living beings on earth consisted of prokaryotic life forms only. The prokaryotic life formed involved phototrophs, heterotrophic bacteria, cyanobacteria, other anoxic photosynthetic bacteria.
Which piece splits apart during a reaction that is catalyzed by an enzyme?