Members of the phylum ________ are characterized by having tube feet
A) Echinodermata
B) Mollusca
C) Annelida
D) Platyhelminthes
E) Arthropoda
A
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What were the genotypes / phenotypes in the Parental generation?
An experimenter crosses two fruit flies with different phenotypes. The results in the F2 generation are: 478 crooked legs, trembling behavior 372 stumpy legs, circling behavior 175 crooked legs, circling behavior 98 stumpy legs, trembling behavior A. Both parents homozygous / Female phenotype: crooked legs, trembling, Male phenotype: stumpy legs, circling B. Both parents homozygous / Male phenotype: crooked legs trembling, Female phenotype: stumpy legs, circling C. Both parents heterozygous / Female phenotype: crooked legs, trembling, Male phenotype: crooked legs, trembling D. Both parents homozygous / Male or female parental phenotype: crooked legs, trembling, Second parental phenotype: stumpy legs, circling E. Both parents heterozygous / Both parental phenotypes: crooked legs, trembling
In Gibson’s experiment with small mammal populations in the tropical forest, ____
a. most species disappeared from small islands within the first 5-7 years after fragmentation b. all species disappeared from small islands within the first 5-7 years after fragmentation c. populations increased 25 years after fragmentation d. most species disappeared from small islands, but quickly recolonized after 5-7 years e. fragmentation had no affect on small mammal species
Which trait of a vascular plant allows it to grow in the direction necessary for survival?
a. apical meristem b. gametangium c. stomata d. sporangia
If A, B, and C are all required for growth, a strain that is mutant for the gene-encoding enzyme A would be able to grow on which of the following media?
A. minimal medium B. minimal medium supplemented with nutrient C only C. minimal medium supplemented with nutrient A only D. minimal medium supplemented with nutrients A and C E. minimal medium supplemented with nutrient B only