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Midodrine, also known as 3,6-dimethoxy-β-hydroxy-N-aminoethanonyl-2-phenylethylamine, is a substituted phenethylamine derivative. [4] Midodrine is an odorless, white, crystalline powder, soluble in water and sparingly soluble in methanol. [19] Midodrine's experimental log P is -0.5 and its predicted log P ranges from -0.49 to -0.95.
Upon hatch, birds do not have a library of genetic information for B cells to use for antibody production. Instead, J cells mature in the bursa during the first six weeks and then go on to seed other organs of the immune system. As a result, birds are highly susceptible to pathogens in the first few weeks after hatching.
Female birds are able to produce more of a certain gender of birds that are more likely to survive under extreme conditions. In birds, the females' egg determines the gender of the offspring, not the male's sperm. In zebra finches, a study showed the effect of food on gender ratio production. For females, egg production is a metabolically ...
A baby reindeer (Rangifer tarandus). This species is precocial and young are able to get up and move around on their own within hours of being born. [6] Precocial young are born with a highly developed sensory and motor system. [1] At birth they are able to see, hear, and most can walk or will learn to walk within the first few days after birth ...
A shallow bird bath is brilliant, not just because it offers the wild birds in your area a place to access clean and fresh water to drink, but also because shallow bodies of water give them the ...
The span between precocial and altricial species is particularly broad in the biology of birds. Precocial birds hatch with their eyes open and are covered with downy feathers that are soon replaced by adult-type feathers. [17] Birds of this kind can also swim and run much sooner after hatching than altricial young, such as songbirds. [17]
Bird experts share their favorite bird feeders, plus give tips on how to keep your bird feeder safe from squirrels and racoons and share the best type of bird seed to fill it with.
All bird eggs contain the following components: [1] The embryo is the immature developing chick; The amnion is a membrane that initially covers the embryo and eventually fills with amniotic fluid, provides the embryo with protection against shock from movement