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3 years ago

How has pliable whale bone been used over the centuries?

Biology

1 answer:

stira [4]3 years ago

8 0

Answer:

Many of the baleen eyeglass frames seen in advanced collections probably date from the late 17th to the very early 19th century. ... Whalebone is easy to carve and shape since it has a pliable almost plastic-like property. As such it was used in various manufacturing industries as a forerunner of plastic.

Explanation:

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In which phylum would you find plants that are closest to the flowering plants, strange group of plants that even undergo the sa

kipiarov [429]

Answer: gnetophytes

Explanation:

This is the only division in the gymnosperms that closely resembles the angiosperms (flowering plants) by carrying out double fertilization. Two groups in the gnetophytes division: Ephreda and Gnetum carry out this form of fertilization

8 0

3 years ago

How many possible open reading frames (frames without stop codons) are there that extend through the following sequence? 5'... C

fenix001 [56]

Answer:

There are 4 reading frames without stop codons.

Explanation:

1) To find the possible reading frames you need to separate your sequence in codons (trios) for the 5'-> 3' sense, first, excluding the first nucleotide, then excluding 2 nucleotides and then not excluding nucleotides.

5'... C TTA CAG TTT ATT GAT ACG GAG AAG G... 3' NO STOP CODON

5'... CT TAC AGT TTA TTG ATA CGG AGA AGG... 3' NO STOP CODON

5'... CTT ACA GTT TAT TGA TAC GGA GAA GG... 3'

2)Then you find the complementary sequence (which you already have)

3'... GAA TGT CAA ATA ACT ATG CCT CTT CC... 5'

3'... GA ATG TCA AAT AAC TAT GCC TCT TCC... 5'

3'... G AAT GTC AAA TAA CTA TGC CTC TTC C... 5'

3) Next, you have to obtain the reverse complementary

CCT TCT CCG TAT CAA TAA ACT GTA AG NO STOP CODON

CC TTC TCC GTA TCA ATA AAC TGT AAG NO STOP CODON

C CTT CTC CGT ATC AAT AAA CTG TAA G

4)Now you need to find start (AGT in terms of DNA) and stop codons(TAA, TAG, TGA, also in terms of DNA), in 5->3 and de reverse complementary.

As you can see, you have for open reading frames that lack of stop codon, unfortunately, they also lack of AGT, the start codon.

I added a table where you can find thestart and stop codons as well as the proteins that they translate to in terms of RNA.

I hope you find this information interesting and useful, good luck!

8 0

3 years ago

If a bottle of beer has 15 grams of carbohydrate, 0 grams of fat, 1 gram of protein and 15 grams of alcohol, approximately how m

Over [174]

Fat: 1 gram = 9 calories, Protein: 1 gram = 4 calories, Carbohydrates: 1 gram = 4 calories, Alcohol: 1 gram = 7 calories

From the question given above, a bottle of beer contains 15 grams of carbohydrate, 0 grams of fat, 1 gram of protein and 15 grams of alcohol.

15 g of carbohydrate = 15 x 4 = 60 calories

0 g of fat = 0 calories

1 g of protein = 1 x 4 = 4 calories

15 g of alcohol = 15 x 7 = 105 calories

60 + 0 + 4 + 105 = 169

Therefore a bottle of beer contains 169 calories.

3 0

4 years ago

Which feature of junipers makes them good at preventing soil erosion?

Ber [7]

The correct answer is (D)

Junipers belongs to genus Juniperus and are coniferous plants. These plants are widely distributed in northern hemisphere, from Arctic, south to tropical Africa and from Ziarat to Tibet, and in mountains of central America.

Juniper is a shrubs and grow densely over an area, shrubs are a great way to deter foot traffic through an area( another contributor to soil erosion). It helps to prevent soil erosion and are easy to grow plants.

5 0

4 years ago

Read 2 more answers

Explain why the small piece of plant tissue is dipped in disinfectant when growing new plants from using cells from a parent pla

love history [14]

Answer: Disinfectant is a chemical formulation which may include biological components used to reduce the population of a microbe from a living or dead surface.

Explanation:

The plant tissue is treated with a disinfectant before culturing it and growing new plants. This is done to remove dirt, dust, foreign particles like pollen, microbes from the plant tissue surface or from plant part. This help in growth of disease free and contamination free plants. The culture can be utilized for different cycles of plant growth as it remains free from any kind of contamination.

7 0

3 years ago