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lesantik [10]
3 years ago
7

As you just learned, in real ecosystems, trophic efficiencies usually vary from about 5% to about 20%. as a result, net producti

on diagrams for ecosystems have a pyramid shape. two key factors explain why trophic efficiencies are relatively low, and thus why net production diagrams are shaped like pyramids.
Biology
1 answer:
konstantin123 [22]3 years ago
6 0
When energy passes from one trophic level to the next, I would guess that the two factors which decrease the total amount of energy from being passed up are: 
1. An organism does not assimilate all the energy of food consumed. Within a consumer, digestion and assimilation of energy is not 100% efficient: some of the energy is lost.
2. A large proportion of energy assimilated by a producer and consumer is lost through respiration, i.e., day-to-day maintenance of metabolic processes.
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indefinite article is used before a noun that is general or when its identity is not known.
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6 0
3 years ago
Assuming that both parents are heterozygous for the gene that causes the disease, what is the probability that the second child
LiRa [457]
The independent assortment of genes is a principle of Mendel and of genetics. Since humans are diploid organisms (they have 2 copies of their genetic information), we have that each gamete carries one of the two available alleles for each feature. These gametes are created in equal proportions.

We have that both parents are heterozygous for a feature, lets say H. Thus, their genotype is Hh. Hence, the child will get with probability 50%=1/2 H from the father and 50%=1/2 h from the father; same from the mother. By doing a Punnett square, we get that there is 1/4 chance that the child is HH, 1/2 chance that it is Hh and 1/4 that is hh. Since the disease is recessive (so both alleles are needed), we have that the chance that the kid has the disease is 1/4.
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5 0
3 years ago
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