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gladu [14]
3 years ago
7

You have a sample that contains 35 grams of Uranium-235 and 525 grams of Lead-207. Uranium-235 has a half life of 713 m.y. How o

ld is the sample?
Biology
1 answer:
ludmilkaskok [199]3 years ago
3 0

Answer:I have this question too

Explanation:

O

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During a pulse-chase experiment, photographic emulsions were prepared at different times during the chase, and radioactive spots
NikAS [45]

Answer:

Pulse chase experiment was performed to find the secretory pathway of proteins inside the cell. The protein sorting and pathway of protein can easily be studied by the pulse chase experiment.

The molecule is labelled with radioactive component and its pathway is observed during the pulse chase experiment. The molecule reside  5 minutes in rough ER. After this 40 minutes in glogi apparatus. From the golgi apparatus the molecules moves towards the endosomes and resides for 70 minutes. The molecules then transferred to lysosomes in 140 minutes. This chasing explains the pathway of the molecule.

The pathway can be drawn is ER→golgi→endosome→lysosome.

5 0
4 years ago
Modern birds have feathers and can fly. when paleontologists discovered a fossil of archaeopteryx, a dinosaur with feathers, the
DedPeter [7]
Archaeopteryx is considered as the missing link between reptiles and Aves

it suggests that Aves evolved from reptiles . the fossil shows that it has both reptilian as well as Avian characters
5 0
4 years ago
Which of the following represents a possible chromosome number of a species that uses sexual reproduction, and why?
Ann [662]

Answer:

B. 62, because this number will create a haploid cell, allowing both female and male gametes to be combined.

Explanation:

Sexual reproduction involves two organisms to come together (male and female). Sexually-reproducing organisms make use of a process called MEIOSIS to produce gametes or sex cells, which have a reduced number of chromosomes as the parent cells producing them.

A sexually reproducing organism must contain a complete diploid chromosome number (2n) that allows it to produce cells with a haploid chromosome number via meiosis. The haploid gamete cells that result from each meiotic divisions of male and female parents can combine to form a whole diploid organism.

3 0
3 years ago
2. desarrolla la siguiente actividad
Zielflug [23.3K]

Answer:

Iwocjfmvjbjdkvjtjfidjfwivjrdjvjvj

Explanation:

P

U

T

A

3 0
3 years ago
Beside deoxyribonucleic acid, what else could DNA stand for?
prohojiy [21]
Deoxyribose nucleic acid
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