Methanoic acid,HCOOH(aq) , is sometimes known as formic acid (from the Latin formica for ant, since ants secrete formic acid). Suppose that an ant uses 1.0 x 10-5 mL of formic acid with a pH of 2.456 every time it bites. What mass of methanoic acid does it use in each bite?
Posted 6 years ago by eric19 in Chemistry 30 | 1 answers
#chemistry 30
#1. Which of the following statements correctly describes the Law of Independent Assortment? Select one:a). Non-allelic genes do not affect each other if they are located on separate chromosomes.b). A large Punnett square can be used to predict the outcome of a parental cross involving two traits.c). The dominant allele is represented with an uppercase letter and the recessive allele is represented with a lowercase letter.d). Sometimes all alleles lack dominance, which leads to a blending of traits.
Posted 6 years ago by Aliya in Biology 30 | 2 answers
#cell divison and genetics
Which of the following statements correctly identifies the difference between plant and animal cells division?
a.) Both plant and animal cells undergo mitosis and cytokinesis, but they lack the interpase
b.) plant cells lack centrioles, and they form a cell plate during cytokinesis
c.) Plant cells lack centomeres, and they form a cell to produce two daughter cells
d.) The cell walls of the plant prevent the process of cytokinesis
Posted 6 years ago by Mekayle2 in Biology 30 | 2 answers
#cell division
A rescue helicopter locates two people caught in an avalanche. The angle of elevation from the first perosn to the helicopter is 26.7 degrees, and the angle of the elevation from the second person to the helicopter is 48.9 degrees. IF the distance between the two people is 165m, determine how far both people are from the helicopter.
Posted 6 years ago by danikam in Math 20-1 | 1 answers
#trigonometry
In ABC, c= 10cm, b= 8cm, and angle B= 35
b)Solve the triangles
Posted 6 years ago by kjhjjhk in Math 20-1 | 1 answers
#trigonometry
Patricia and Trent are 48 m apart. The angle of elevation from Patricia to the hot air balloon hovering in the sky between her and the Trent is 43 degrees, while the angle of elevation from Trent to the balloon is 31 degrees.
a.) Draw a diagram of the situation
b.) Determine the distance between the ballon and the person farthest from the balloon. Round to th nearest tenth of a metre
Posted 6 years ago by danikam in Math 20-1 | 2 answers
#trigonometry
Patricia and Trent are 48 m apart. The angle of elevation from Patricia to the hot air balloon hovering in the sky between her and the Trent is 43 degrees, while the angle of elevation from Trent to the balloon is 31 degrees.
a.) Draw a diagram of the situation
b.) Determine the distance between the ballon and the person farthest from the balloon. Round to th nearest tenth of a metre.
Posted 6 years ago by kjhjjhk in Math 20-1 | 1 answers
#trigonometry #rational expressions
A student's research indicates that the planet mercury's radius is 2.164*10^6 m and its mass is 3.1*10^19kg
calculate the gravitational field strength at Mercury's surface.
Posted 6 years ago by in Science 30 | 1 answers
#science 30
a cell phone battery has 9.00x10^-3kwh of energy stored in it. If the battery runs at 3.20V and draws an average of 0.375A of current, how long will the battery last?
Show your work, include formulas, substitution, and express your answer rounded correctly with appropriate units
Posted 6 years ago by pearl.b in Science 30 | 1 answers
#science 30 #physics #current
#3. In garden pea plants, the yellow seed colour (Y) is dominant over the green see colour (y). What are the genotypes of heterozygous yellow seeds and homozygous recessive seeds repectively? a). Yy&YY. b).yY&yy.c).Yy &yy d).Yy& yY. I think that the answer they are looking for is A but i am not sure.
#4.In garden pea plants, the purple flower color (P) is dominant over the white color flower (p). What are the phenotypes of homozygous dominant and heterozygous flowers, respectively? Select: a). White and purple. b). Purple & qhite c). White & white. d). Purple, purple. I think it is b but im not sure
#5. In fruit flies, grey body color (G) is dominant over black body clour (g). A cross between a heterozygous grey fruit fly and a black fruit fly can be represented by a). Gg x Gg b). Gg x GG c). Gg x gg. d). GG x gg. I think it is D but i am not sure.
#6. In fruit flies, long wings (L) are dominant over short wings(l). LL,Ll and ll represent a). Three genotypes. b). three dominants. c). three phenotypes. d). three true breeding crosses. I think it is b.
#7. when a trait is only expressed in the presence of two identical alleles, the genotype is: a). Homozygous dominant. b). Homozygous recessive. c). Heterozygous recessive. d). Hetrozygous dominant. I think it is a but again not sure.
#8. In sheep a hairy coat (H) is dominant over a wooly fleece(h). The phenotype of a heterozygous sheep and a homozygous recesive sheep are repspectively, a). Hairy and hairy. b). hairy and wooly. c). HH and hh. d). Hh and hh.
#9. In garden pea plants, the yellow seed colour (Y) is dominant over the green seed color(y). A true breeding yellow-seeded plant was crossed with a green-seeded plant. All of the F1 generation plants had yellow seeds. Which of the following states is true for the F1 generation? a). None of the F1 generation plants will have the same allele for green seeds. b). Half of the F1 generation plants will have the same allele seeds for yellow seeds. c). All of the F1 generation plants will have the allele for green seeds. d). None of the F1 genertation plants will have allele for yellow seeds.
#10. In mice, the waltzing allele (w) that causes the mouse to run in circles due to an inner ear defect is recessive to the non- waltzing allele(W). If a heterozygous mouse mated wit ha walting mouse. If a heterozygous mouse mated with a waltzing mouse, a). 100% of the offspring would have a copy of the recessive allele. b). 75% of the offspring would have the dominant trait. c).100% of the offspring would have the same copy of the dominant allele. d). 75% of the offspring would have the recessive trait.
#11. Use the following info for question 12 as well. In mice, albinism (g) IS recessive to grey coat colour (G). A grey mouse mated with an albino mouse. Over the course of several months, 38 pups were born. Out of 38 pups, 17 had a grey coat and 21 were albino. Which of the following rows correcrly identifies the parental and F1 generation genotypes? a). Parental corss GgxGG F1 Genotypes GGxGg. b). Parental cross GGxgg F1 generation Gg. c).Ggxgg F1 generation GG, Gg and gg. d).Gg x gg F1 generation F1Gg and gg.
#12. Theoretically what is the excepted result from the parental cross of a grey mouse and albino mouse, and why does teh excpeted result not match the result stated in the information given above? a). Theoretically, there should be a 1:1 ratio of grey mice to albino mice, or grey coat mice and 19 albino mice. With more litters, the actual results would match the expected results more closely. b). Theoretically, 100% of the mice should have grey coats so all 38 offspring should have grey coats. There was an experimental error that can account for the deviation.c). Theoretically, there should be a 3:1 ratio of grey mice to albino mice, or 29 grey coat mice and 9 albino mice. With more litters, the actual results would match the expected results more closely.d). Theoretically, there should be a 3:1 ratio of grey mice to albino mice, or 28.5 grey coat mice and 9.5 albino mice. There was an experimental error that can account for the deviation.
#13. Which of the following statements describes the law of segregation? a). A Punnett square can be used to predict the outcome of a parental cross. b). the dominant allele is represented with an uppercase letter and the recessive allele is represented with alowercase letter.c). Dominant alleles are always expressed in a homozygous or heterozygous individual.d). A Bb individual will produce B and b alleles, while a bb individual will only produce a b allele.
Hi there, i need help with these questions. Please help me with this when you see my post. Please and thank you :)
Posted 6 years ago by Aliya in Biology 30 | 1 answers
#cell divison and genetics