I believe that the best answer among the choices provided by the question is <span>D) A study by Dr. Birde showed that the number of songbirds in her yard increased due to a modified food source.</span>
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.
<span>FOOD CHAINS FOLLOW A SINGLE PATH AS ANIMALS EAT EACH OTHER.
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<span>FOOD WEBS SHOW HOW PLANTS & ANIMALS ARE INTERCONNECTED BY DIFFERENT PATHS.</span>
Bacteria Growth Rate Formula:
N(t) = N(0) * ( 1 + r)^t
where, N(0) is the number of bacteria present at the beginning of the experiment, r is the growth rate, t is the time taken/ elapsed.
Substituting the numbers for N(t), N(0) and t from the given description, we get the value of r.
220 = 20*(1+r)^(24 hours)
Solving for r, we get r = 0.105074.
1 week has (7 x 24 = 168) hours in it.
Therefore, N(168 hours) = 20*(1+0.105074)^168
Which is approximately 390 millions.
Hence there will be 390 millions bacteria at the end of 1 week.
Club mosses, horestails and ferns are types of vascular seedless plants.
These types of plants reproduce through spores rather than the fertilization of seeds. The weight of spores is much lighter than that of seeds. These plants also require ample water for fertilization. The combination of light wind and moisture that is needed for reproduction means that you will often find these plants in damp or wet areas. Thinking of how mosses and horsetails are found in wetter areas will help you to remember this.
Answer:
Option (b).
Explanation:
The new life form should show the new characteristics that has not been earlier shown by the other life forms. The newly discovered life form should also shows the characteristics that are shown by the living organism.
The putative life form should show different anatomical structure or different way to react towards a stimulus. The bilateral symmetry can not be considered as a new life form because may animals are bilaterally symmetrical and this is not a new characteristic.
Thus, the correct answer is option (b).