<u>Answer</u>: 
The null hypothesis: the mean egg thickness is 0.2 mm 
The alternative hypothesis: the mean egg thickness is less than 0.2 mm 
In statistics, the null hypothesis states that there is no significant difference between the observed value and the mean thickness. The alternative hypothesis states is the opposite and states the scientist's "idea" behind the experiment. Here, it refers to the fact that due to DDT, the egg shell will be thinner compared to the mean value. 
 
        
             
        
        
        
Answer:
UACAGCGACUAUGACA
Explanation:
mRNA and DNA have the same nucleotides, except mRNA has U (Uracil). U bonds with A (Adenine).
Hope that helps. 
 
        
             
        
        
        
The correct answer is - 1,180 km.
North America and Europe move away from one another, though on the other end of the plates, the Eurasian and the North American plates are actually merging. Since the rate of moving away is 2 cm per year, and the current distance is 1,184 km between North America and Europe, the distance between them 200,000 years ago was 1,180 km.
To get to the result we only need to multiply the number of years with the annual movement
2 x 200,000 = 400,000
Then divide the result with 100,000, as that is how much cm are in one km
400,000 / 100,000 = 4
And we get 4 km, in this case 4 km less, thus the distance between the two, 200,000 years ago, was 1,180 km.
 
        
             
        
        
        
Answer:
swim
Explanation:
because frogs were born with no feets so it can swim even though frogs have feet
 
        
             
        
        
        
 Answer: It enables them to cover more of the visible light spectrum and therefore be able to harvest more light energy.
<span>Pigments can be defined as the molecule that
absorb specific wavelength of light or they are substances produced by living
organisms that obtain color from selective color absorption.  Thus, the function of pigment in plant is photosynthesis
and they use green pigment chlorophyll with other pigments such as yellow and red
pigment which are being used to captures much light energy as possible.
However, plant gain from having much more than one pigment because it enables
them </span>to cover more of the
visible light spectrum and therefore be able to harvest more light energy.