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Posted January 22
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Birding: Annual bird counts include interesting lingerers
Warmer York County especially holds a range of seasonal holdovers in the Christmas Bird Counts.
BY HERB WILSON
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The 117th Christmas Bird Count is now over. As usual in January, I will discuss the highlights of some of the Maine counts. These standardized censuses provide an important tool to monitor the abundance of winter birds throughout North America and beyond.
I’ll concentrate on changes in regularly wintering birds, the arrival of unpredictable invaders and records of lingering birds whose wintering areas are well to our south. A rarity or two may pop up as well.
We’ll start with the southern Maine coast. The York County count was held on Dec. 21. Thirty observers found 82 species of birds.
The correct size order from the smallest to the largest is:
Animal cell >> Mitochondrion >> Ribosome >> Hexokinase >> ATP >> O2
- The animal cell size is about 20 to 30 micrometers (μm), although it varies according to the type of the cell.
- The average mitochondria size is approximately 0.75 to 3 μm. The size, number, and structure of mitochondria in an animal cell vary according to type of animal cell.
- The ribosome size is approximately 0.02 μm in diameter.
- An enzyme is a macromolecule whose size is variable (its average size is 3–7 nanometers, i.e., 3-7 nm). A micrometer (μm) equal to 1000 nm.
- The adenosine triphosphate or ATP (the energy coin of the cell, which is composed of a five-carbon sugar, three phosphate groups, and adenine) and molecular oxygen (O2) are both simple molecules whose sizes are very small compared to enzymes.
Learn more in:
brainly.com/question/20447564?referrer=searchResults
Its A directional because <span>In directional selection, selection pressures favor an extreme, in this case, short </span>plants<span>.tall</span>
A doubling of the rabbit in a certain area will cause certain changes in the ecosystem, for some organisms will be good, for some not so much.
The doubling of the population of rabbits will mean that they will need much more food. That will lead to the grass being overgrazed, and it will start to decline.
On the other hand, the increased rabbit population means much more food, which will lead to an increase in the population of eagles who have the rabbits as pray.
Depending on the type of snake, if they are able to attack and consume the rabbits, than their population may increase slightly, but if not, than the snakes's population will decrease because of the increased number of eagles, who also see them as prey.
<span>The lymphatic system is considered as the subsystem of the circulatory
system that is composed of networks of vessels, tissues and organs in vertebrates.
Its anatomy is composed of lymph nodes and lymphatic vessels which connect the
other parts systematically. A picture of the lymphatic system is attached below.</span>