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Nataly_w [17]
3 years ago
5

(PLESE HELP ME) If a force of 20.0 N is used to lift a box a distance of 0.5 m, how much work is done? (INCLUDE THE UNIT for wor

k!)
Biology
2 answers:
ioda3 years ago
8 0

Answer:

Solution given:

force(f)=20N

distance [d]=0.5m

work done =force ×distance =20×0.5=10joule

ASHA 777 [7]3 years ago
4 0

Answer: 100 J

Explanation:

W = F*d

F = 20 N

d = 0,5

-------------------

W = 20 * 0,5

W = 10 J

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Excited what carry the absorbed energy in photosynthesis :
Alisiya [41]
Electrons get “excited” or charged by sunlight, then they move on through the photosystem 2 and 1 along the etc or electron transport chain
7 0
3 years ago
2. The Bionic Pancreas Until recently, diabetics could rely only on regular blood sugar checks, medications, and low-carbohydrat
ryzh [129]

Answer:

to maintain homeostasis

Explanation:

The bionic pancreas is a technology created to reduce and adjust blood sugar levels in patients with diabetes. This external device was developed by Ed Damiano's lab at Boston University. This management system is well known to maintain homeostasis by managing blood sugar levels: the bionic pancreas contains two pumps, one with insulin and the second one with glucagon for controlling the sugar levels when they change in the blood.

7 0
3 years ago
[Chapter 3-4] A cross was carried out between the following two pureline parental strains:Parent 1: A/A; b/b; D/D; e/e; F/FParen
andrew-mc [135]

Answer:

Following the selfing of the F1 from the cross between the two parental strains, what proportion of the F2 individuals will phenotypically resemble either one of the two parental lines?

= 7.03% of F2 progeny will resemble parent 1

= 2.34% of F2 progeny will resemble parent 2.

Explanation:

Parent 1: AA; b/b; D/D; e/e; F/F

Parent 2: a/a; B/B; d/d; E/E; f/f

F1 Progeny: A/a; B/b; D/d; E/e; F/f

knowing that the F1 progeny is selfed, the possible gamete outcomes are:

ABDeF , ABDEf, ABdeF, ABdEf

AbDeF , AbDEf , AbdeF , AbdEf

aBDeF , aBDEf , aBdeF , aBdEf

abDeF , abDEf , abdeF , abdEf

All gametes are either eF or Ef (the two parental genotypes) and never EF or ef.

At the A, B and D loci, the F1 are heterozygotes. Therefore, in the F2 progeny, for each locus, 3/4 of the progeny will have the dominant trait while 1/4 will have the recessive phenotype. Further, 1/2 of all F2 progeny will have the haplotype eF and the other half will be Ef.

<u>Proportion of progeny resembling Parent 1: </u>

Parent 1 has the Phenoytpe AbDeF. As previously discussed, 3/4th of all F2 progeny has the phenotype A, 1/4th of F2 progeny has the phenotype b, 3/4th of F2 progeny has the phenotype D and 1/2 of F progeny has the phenotype eF.

Thus, the proportion of progeny resembling Parent 1

= 3/4 x 1/4 x 3/4 x 1/2 = 0.0703125

= 7.03% of F2 progeny will resemble parent 1.

<u>Proportion of progeny resembling Parent 2</u>:

Parent 2 has the Phenoytpe aBdEf. As previously discussed, 1/4th of all F2 progeny has the phenotype a, 3/4th of F2 progeny has the phenotype B, 1/4th of F2 progeny has the phenotype d and 1/2 of F progeny has the phenotype Ef.

Thus, Proportion of progeny resembling parent 2

= 1/4 x 3/4 x 1/4 x 1/2 = 0.0234375

= 2.34% of F2 progeny will resemble parent 2.

7 0
3 years ago
It is possible for two parents each with brown eyes to produce a blue-eyed child.
elena55 [62]

Answer:

True

Explanation:

The color of the baby's eyes is influenced by the genetic inheritance (of the genes transmitted by the mother and father) and the amount of melanin (brown or black pigment whose type and amount is encoded in the genes) found in the iris.

Eye color is controlled by at least three genes, although researchers still only understand the role of two of them. Determining eye color is an extremely complex process and there are several conditioning factors and genetic combinations that can influence the final color.

The more melanin, the darker the color of eyes, skin and hair. If parents have both brown eyes, it is natural for their children to have the same color. However, there may be a genetic influence from an ancestor and the child expressing a different color.

If the presence of melanin in the iris is reduced, the baby will have blue eyes, even if father and mother have brown eyes. If the presence of melanin is higher, the eye color will be green or hazel. When there is a large production of melanin, the eyes are brown, predominant color over green or blue and therefore more common. The least common color is green.

4 0
3 years ago
Girdling a tree involves cutting a deep groove all the way around a tree trunk; it would have the effect of:
wlad13 [49]

Answer:d. interrupting the passage of phloem sap and killing the tree.

Explanation:plants contains vascular bundles for conducting water and salt and dissolved food , throughout the plant.the vascular bundles; xylem and phloem are located close to the bark of the tree.

Girdling a tree involves cutting a deep groove all the way around a tree trunk.this is done to kill the tree.the phloem is removed along with the back of the tree.the xylem might remain intact.the phloem functions primarily to move food materials from one part of the tree to another.when it is removed,food materials produced in the leaves cannot get to the root.

After a while ,the root dies and so does the tree

8 0
3 years ago
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