Which of the following BEST describes varicose veins? A. Veins cannot prevent the backflow of blood. B. Veins lose the ability to transport blood to the heart. C. Veins become used for transporting blood to and from the heart. D. Veins become less efficient at transferring waste to the blood. Please select the best answer from the choices provided. A B C D
Answers: 1
Biology, 21.06.2019 16:30, poniatowski23
Plz plz plz quick! 49 points for whoever which of the following statements about greenhouse effect is true? *life on earth is suffering because of greenhouse effect *the greenhouse effect is caused by human activity *all greenhouse gases are harmful *life on earth would not exist without the greenhouse effect
Answers: 2
Biology, 22.06.2019 01:30, makennahudson94
All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.
Answers: 1
Biology, 22.06.2019 03:00, elishaheart21
Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.
Answers: 3
Which of the following BEST describes varicose veins? A. Veins cannot prevent the backflow of blood....
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