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iren [92.7K]
3 years ago
10

I WILL GIVE 20 EXTRA POINTS!!

Biology
1 answer:
mariarad [96]3 years ago
4 0

Answer:

Due to DDT ban

Explanation:

DDT is an pesticide or insecticide which got banned because of its harmful effect in environment.

According  to the graph the eggshell of both the bird species A and B are thick in 1930 but begin to thin after 1940 as DDT (Dichlorodiphenyltrichloroethane) introduced in the ecosystem.

Eggshell return to their original thickness by 1980 because DDT got banned after 1970. DDT is a harmful pesticide which alter the bird's calcium metabolism which leads to thin eggshells.

Hence, due to banning of DDT after 1970,egg shell of either species return to their original thickness by 1980.

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The author of the book (El-Haiwan) in which he mention animals is True or False​
Rom4ik [11]

Answer:

<em>True</em>

Explanation:

El- Haiwan is an important Arabic book which has been translated to many different languages. The book's title refers to the meaning of animals in the English language. This book is very important in explaining many biological phenomenons taking place in different animals. This book also explains about reproduction which occurs in animals. Corpus Aristotelicum is known to be the writer of this book. Hence, the above statement is true.

7 0
3 years ago
A team of scientists conducted a study of grassland ecosystem and estimated the total energy at each trophic level. Their data i
maria [59]

Answer:

In grassland ecosystem, first trophic level is the producer. Producers are the organisms which makes their own food, here the producer are grasses. The second trohic level contain herbivores which feed on these grasses. These herbivores are eaten by secondary consumers which belongs to third trophic level and secondary consumers are then eaten by tertiary consumer.

The population of producers are very high so it is placed at the base while tertiary consumer are placed on the top due to low population.

8 0
3 years ago
The three major types of muscle tissue differ in
katrin2010 [14]

Answer:

Muscle tissue is categorized into three different types: skeletal, cardiac, and smooth. Each type of muscle tissue in the human body has a unique structure and a specific function. Skeletal muscle moves bones and other structures. The heart muscle contracts the heart to pump blood.

5 0
3 years ago
What do you think happens to a wave’s energy below the surface?
White raven [17]

Answer:

wave power is greater

Explanation:

deep water waves meaning that the depth of the water is greater the wave length

7 0
3 years ago
All individuals have two alleles for a given trait. According to Mendel's ____________, these alleles are passed down one each f
nata0808 [166]
The correct answer for this question is A. Law of segregation.

All individuals have two alleles for a  given trait. According to Mendel's Law of segregation, these alleles are passed down one each from both mother and father.  

Explanations;
According to this law of segregation the allele pairs separate or segregate during the formation of gamete, during the process of meiosis, leaving each cell with a single allele for each trait, and randomly unite during fertilization. One pair of allele comes from the mother while the other pair comes from the father, and joins together to form a diploid cell. Therefore, organisms inherit two alleles for each trait one from each parent. 
5 0
3 years ago
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