Answer:
x4 objective
Explanation:
The student should use the x4 objective lense in order to be able to observe the palisade cell of a leaf.
<em>The palisade cells are located below the cuticle and the epidermis of the leaf and the x4 objective will provide the largest field of view for adequate study by the student. The x4 objective is also easier to focus compared to the lower objectives.</em>
This organism is a coyote brush or the Baccharis pililaris. It is a shrub that is a family of daisy. They are mostly found in California, Washington and Oregon. This plant takes a different shape depending on the environment where it is found. It grows in a chaparral biome where there is little biodiversity and a habitat of only few species.
It would have to be the third answer, "a strong thunderstorm destroys many of the nests of a bird population."
<span> Wow, this is a big question, but here goes. Freckles q: 1) Since freckles is the dominant phenotype, this means that Olivia must have the recessive phenotype, which is only given by the genotype ff. FF and Ff would both give freckles because, again, freckles is dominant. So any genotype with F_ would give freckles. 2)Same answer as #1. 3) Since they only have f alleles to pass on, both the dad and the mom will pass on one f each to 100% of their children. So all will have genotype ff and no freckles.
Hairline q: Since the parents are heterozygous, this means that their genotype has one of each allele to give Hh. (Even though you said they are quadruplets, I'm going to assume they are fraternal (different DNA) b/c otherwise they'd always have the same genotype if they are identical). 1) Okay, so when you do the Punnett square for Hh x Hh, you'll get 1HH:2Hh:1hh. Since widow's peak is dominant, any genotype with H_ gives the widow's peak. So, there are 3 options from the Punnett square, so you'll have 3 of the kids with widow's peak. Theres a 3/4 chance that a child will have widow's peak from these parents. 2) Since straight hairline is recessive, you need hh to get this phenotype and there is only one option. So, there will only be one child with the straight hairline. (1/4 chance). 3) Homozygous dominant means that you have two of the dominant allele, so HH. Since there is only 1 option, there is only one child with this genotype.
Tongue q: Since rolling the tongue is a dominant trait and the parents both can't roll their tongues, they must have a homozygous recessive genotype for this to happen (remember in dominance, any genotype with a dominant allele will give the dominant phenotype), so they have tt. 1) Since again they can only pass on t alleles, the kids will all have tt, so no one can roll their tongues. 2) None of them are hybrids because there was no variety in the genotypes or anything. Both parents had tt, so they were same in genotype. 3) She will have tt because of the above stated reasons.
Dimples q: Since all four kids have dimples, the dominant phenotype, they must all have the genotype D_ (either Dd or DD). 1) Since Marcus is a hybrid, this means that he had parents that were DD x dd to give him the genotype Dd. Since he has a recessive allele d in his genotype, Olivia must have all dominant alleles to make sure that each child has at least one dominant D. So, she must have the genotype DD. 2) Since she is DD, the dominant alleles will make her have dimples.
Earlobe q: 1) Since the parents are EE both, a cross of EE x EE will give EE genotype children. So, all children have EE, this means they all have free earlobes. So the ratio is 100% free to 0% attached earlobes. 2)Homozygous means they have two of the same alleles. Since all of them have EE, 100% of them are homozygous.
PTC q: Marcus has genotype bb and Olivia has genotype Bb because she is heterozygous. 1) The cross of bb x Bb gives 1Bb:1bb, So, 1/2 can taste the paper, so 50% can taste. 2) Since Violet can't taste the paper, she must be recessive and have the genotype bb. Since both of the boys can taste, they must have the genotypes Bb. Since 1/2 is already Bb, Claudia must be bb to help create the 50% that can't taste in the kids. 3)So, 2 people out of the family can taste the paper. Even though Olivia has Bb and should be able to taste, she can't. So, only Jonas and Nathan can taste the paper.
Pheww... done.. Hope this helps! :)<span>
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Ileostomy is a procedure where the end of the small intestine, called the ileum, is brought out of an opening in the belly through surgery. The opening is called a stoma, and its shiny, bright red in color. It is often done after the large intestine has been removed due to cancer or serious physical injuries. Having a stoma, and the need of emptying it several times a day, is disfiguring so the patient often suffer from poor self image. The patient in the case, may be concerned of being unable to continue romantic relationships due to having a stoma. As a nurse, make sure to first make patient understand that ileostomy surgery does not involve the reproductive organs or the gonads. Then, acknowledge that while having a stoma is disfiguring, many organizations are helping increase awareness and acceptance of those who have the condition. Refer the patient to such local stoma advocacy organizations.
