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natulia [17]
3 years ago
13

I need the answer really fast if you answer first ad correct i give brainliest

Biology
1 answer:
Alex17521 [72]3 years ago
6 0

Answer:

well 5% around US so it would affect alot of people in a way because if People don't get the vaccine people will be affected

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Circle the letters of each structure that plant cells contain
Alik [6]

Answer:

<h2>B. ER</h2>

Explanation:

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4 0
2 years ago
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Which process produces human egg and sperm cells?
Novay_Z [31]
Gametogenesis, the production of sperm and eggs, involves the process of meiosis. During meiosis, two nuclear divisions separate the paired chromosomes in the nucleus and then separate the chromatids that were made during an earlier stage of the cell's life cycle.
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3 years ago
Different variant forms of a gene are referred to as ______________
slavikrds [6]

Answer:

Alleles.

Explanation:

Gene may be defined as the functional segment of DNA that codes for the particular protein. Genes are responsible for the phenotype and genotype of the organism. Each gene may exist in multiple forms.

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Thus, the correct answer is alleles.

6 0
3 years ago
Scientists can genetically engineer bacteria to make medicines like ____ to help us
Sauron [17]

Not long ago, if you were diabetic, the insulin your doctor prescribed would have come from a pig. If you required human growth hormone, it would have come from human cadavers, a source that is costly, not to mention a little creepy.

Now, these and other medicines can be made by specially-modified bacteria, called transgenic bacteria. These single-celled organisms have foreign genes along side their own DNA. They live and reproduce like ordinary bacteria, but they also do a bit of extra duty, and produce human proteins for medicines and vaccines.

Farm animals have also been put to work making drugs for humans. It's called gene pharming. For example, antithrombin III, which prevents blood clotting during surgery, is secreted in the milk of transgenic goats. To create these transgenic goats, scientists used a needle thinner than a human hair to inject the DNA sequence for antithrombin III into goat eggs. Then they transplanted the fertilized transgenic eggs into female goats.

Scientists also hope to use genetic technologies to make "magic bullets," drugs that are designed to target specific antigens (disease-causing substances) while leaving healthy tissue alone. "Magic bullets" would have few side effects, because they would consist of antibodies, the same kind of specific weapons that our own immune systems use to kill invaders like viruses, bacteria, or even cancer.

Drug Manufacturing Plants

Along with bacteria and farm animals, plants are being genetically engineered to make human hormones, antibodies, and blood-clotting factors. Bananas are being engineered to deliver vaccines.

To make a transgenic plant, scientists mix foreign DNA with protoplasts, plant cells that have had their tough cell walls removed. Then, they run a small electric current through the mixture. The current makes tiny holes in the cell, allowing the foreign DNA to enter. Once the protoplast develops into a plant, the medicine it has been tricked into making can be extracted from the plant's seeds.


4 0
3 years ago
Hypothesis: homologous structures are evidence of a common ancestor ?<br><br> Why is this correct ?
weqwewe [10]
Yes, because homologous structures are different structures we have that other different organisms might have. humans and monkeys both have arms, although they are completely different species, this can tell scientists that they could have shared a common ancestor in the past, and may have evolved
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