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garik1379 [7]
4 years ago
5

Consider this ecological pyramid found in the Great Lakes ecosystem. Ecological pyramids are diagrams that are used to show how

much energy, the number of organisms, or how much biomass may be found at each trophic level of all the food webs of a community. Why are the autotrophs, in this case the algae, always placed at the base of the pyramid?
Biology
1 answer:
Katyanochek1 [597]4 years ago
7 0
Autotrophs are organisms that uses light energy or energy stored in chemical compounds to make energy-rich compounds. The reason why autotrophs always occupy the lowest level of ecological pyramids is because they are the link between the sun's energy and the organisms that cannot manufucture their own food. Without an abudant amount of autotrophs we would be severely lacking in atmospheric oxygen and food. 
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How are catastrophism and gradualism different
Elza [17]

Catastrophism is associated with major changes that occurs once at a time in a species while gradualism is associated with tiny changes that occurs over a period of time that finally contributes a bigger evolutionary change.

<u>Explanation:</u>

The events that are sudden, short-lived, violent occurring worldwide thereby changing the shape of the Earth is Catastrophic. This process is opposite to contrast to  gradualism which is also called as uniformitarianism. This process is associated with slow and also incremental changes. Erosion is the best example for this process.

The formation of major mountain chains and great floods are some of the examples of Catastrophism. Both are associated with the changes that occurs in a species by the time taken for the changes determines whether it is Catastrophism or gradualism.

8 0
3 years ago
Punnett squares use mathematical probability to help predict the genotype and phenotype combinations in genetic crosses Select t
gladu [14]

Answer:

The first three steps are related to the construction of Punnett squares and the fourth step is not part of the square construction since information related to the phenotype It can be established as a conclusion or result of the genotypes obtained.

Explanation:

Punnett squares is designed to predict the mathematical probability of genotypes in the offspring, according to the genotype of the parental generation, and records only information related to this genotypes.

Taking as an example the crossing between a dominant homozygous (AA) individual for an character and a recessive one (aa), a Punnett square can be constructed:

     A. All possible combinations of alleles in the gametes produced by one parent are written along the top edge of the square :

♀️\♂<u>       A          A   </u>

    B. All possible combinations of alleles of the other parent are written along the left edge of the square.

♀️\<u>♂</u><u>       A          A   </u>

a          

a

    C. All possible genotype are written inside the boxes within the square, as they might appear in the offspring

♀️\<u>♂</u><u>       A          A   </u>

a           Aa        Aa        

a           Aa        Aa

<u>The result of the crossing of an individual with AA genotype and another aa is a offspring of Aa hybrid individuals, according to the information obtained from the Punnett square</u>.

Information related to the phenotype is not part of the Punnett square, but from the genotype a conclusion can be drawn and established, which can be written below, and not on the sides of the square. In this case, the phenotype would be 100% of individuals exhibiting the dominant character A.

Learn more:

brainly.com/question/2984140

3 0
4 years ago
Which of the following investigation types does not represent the descriptive method of scientific inquiry?
Alex Ar [27]

Answer:

<u>Laboratory experimentation</u><u>.</u><u> </u><u>is </u><u>answer</u>

7 0
3 years ago
Which of the following statements are true of anatomy and physiology?
ANTONII [103]

Answer:

Option D and E

Explanation:

Hope it was helpful for u

5 0
3 years ago
There is presense air sac in stem of free floating plant why?​
Vanyuwa [196]

Answer:

Since they need to float, leaves on the surface of plants are flat. 6. The presence of air sacs enables them to float. Their roots are smaller so water can spread freely and directly into the leaves

5 0
3 years ago
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