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| Articles about Mammals |
| 100,000 marine mammals, 1 million seabirds die | | 2008-06-23 07:26:54 | | Maybe if 100,000 marine mammals ans 1 million seabirds all died on the same day every year, in a very visible way, we would start taking plastics pollution of our oceans seriously. Instead, this is the yearly toll that plastics pollution causes, and most of us don't see it. That makes it easy to ignore, easy not to take actions that would make a difference.The NY Times has an article on efforts to clean up plastics pollution on the shores of Gore Point, Alaska. I wrote about plastic in our oceans here and here in February and April. Stop and Shop is certainly promoting re-usable bags in its grocery stores, but so far has not yet discontinued plastics. Hope they do it soon.Last month Gov. Patrick signed the nation's first comprehensive Ocean Planning legislation.The legislation, sponsored by Senate President Therese Murray, Senator Robert O'Leary and Senator Bruce Tarr, ends decades of ad hoc decision making by placing oversight, coordination, and planning authority of the state's ... | | By: Michaelann Land | | |
| | Magnificent Mammals- Toddler Program at the Orange County Zoo | | 2008-03-30 14:35:00 | | Magnificent Mammals is part of the Orange County Zoo's Toddler/Preschool program. From tiny furry creatures to large furry ones, the little ones will learn all about mammals in this fun class! Class includes hands-on learning and fun crafts. Phone registration is required since this is a very popular class. Event Fee: $5.00 (includes zoo admission for child enrolled in the class and ONE parent)Parking Fee: Irvine Park entry fee: $3 weekdays and $5 weekendsAge: 3-4 years old (parent must accompany child)Orange County Zoo1 Irvine Park RoadOrange, CA 92869(714)973-6847For registration Call Marcy Crede-Booth, Education Coordinator at (714) 973-6846. Additional parents/siblings/family/friends must pay admission fee to enter zoo.... | | By: Daytrippingmom | | |
| | Genomic Imprinting in Mammals: Emerging Themes and Established Theories | | 2006-12-04 08:36:38 | | [This post also appears in the General Evolution News category]An open access/free review paper from PLoS Genetics:Genomic Imprinting in Mammals: Emerging Themes and Established TheoriesAndrew J. Wood, Rebecca J. OakeyThe epigenetic events that occur during the development of the mammalian embryo are essential for correct gene expression and cell-lineage determination. Imprinted genes are expressed from only one parental allele due to differential epigenetic marks that are established during gametogenesis. Several theories have been proposed to explain the role that genomic imprinting has played over the course of mammalian evolution, but at present it is not clear if a single hypothesis can fully account for the diversity of roles that imprinted genes play. In this review, we discuss efforts to define the extent of imprinting in the mouse genome, and suggest that different imprinted loci may have been wrought by distinct evolutionary forces. We focus on a group of small imprinted domains, which consist of paternally expressed genes embedded within introns of multiexonic transcripts, to discuss the evolution of imprinting at these loci.IntroductionThe process of sexual reproduction dictates that mammals inherit two copies of every gene, one from the mother and one from the father. At most loci, both alleles are actively transcribed and functionally equivalent. Imprinted genes represent an exception to this rule, as the transcriptional activity of each allele is determined by the gender of the parental germ line to which it was most recently exposed. This parental legacy is initiated by epigenetic modifications such as DNA methylation, which is established in the parental germ line and maintained throughout somatic development in the offspring. Individual germ-line marks can control the allele-specific silencing or activation of multiple neighbouring genes, which leads in many instances to clusters of imprinted transcripts. Such loci represent an attractive paradigm ... | | By: Evolution Research - Main Blog | | |
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