Answer:
it increases oxygen levels and decrease carbon dioxide levels
<span>Energy Flows from the producer level to the consumer level. Plants and algae produce food by photosynthesis. They are consumed by primary consumers like rabbits, deers. Primary consumers are consumed by secondary consumers like snake, which are consumed by tertiary consumers like eagle. This, energy flows to higher trophic levels and almost 10% of the nergy is lost at each trophic level.
</span>
Question
Scientists observe several strata that are tilted at an angle. What most likely caused the tilting?
A. The strata were deposited at an angle.
B. Fossils were deposited within each stratum.
C. The strata were moved after they were deposited.
D. The strata were deposited in a small area.
Answer:
c) The strata moved after they were deposited
Explanation:
Strata can be defined as a layer or layers of sediments, sand e.t.c. that have been deposited at a particular area or land on the earth surface thereby leading to the formation of sedimentary rocks. Strata possesses distinct features that separates it from other layers in the rock.
Strata in rocks occur in an horizontal form or horizontally. If the strata or layers of the rocks look tilted it is because strata was moved after it was deposited.
The statement which correctly describes natural selection is (1) it favors the survival of certain members of the species and results in a change in the proportion of individuals with highly <span>adaptive traits.
Natural selection, by definition talks about the successful passing down of genes from older generations to younger generations. These then are better adapted to their environment. This is exactly what the first answer is about. </span>
Explanation: Scientists believe the increased risk is due to the extra chromosome, chromosome 21, that causes Down syndrome. Persons born with Down syndrome have three copies (instead of the normal two copies) of this chromosome.