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dem82 [27]
3 years ago
13

What is the name of the small flap of tissue that seals off the trachea during swallowing?

Biology
1 answer:
vekshin13 years ago
8 0
The answer is epiglottis.
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Which contraceptive method is 100 percent effective at preventing pregnancy?
emmainna [20.7K]

The correct answer is D. Abstinence

Explanation:

A contraceptive method or birth control method refers to a method used to avoid pregnancy or reduce the probability of getting pregnant. From antiquity, there have been different contraceptive methods but only in the last decades, methods have been designed based on science and its effectiveness has been studied.

Because of this, nowadays there are many contraceptive methods such as pills, condom, and implants that are about 80% to 95% effective, sterilization that is a around 98% effective and natural methods that have a lower percentage of effectiveness. But the only method that has been proven as completely effective or 100% effective is abstinence because by avoiding any type of sexual intercourse it is virtually impossible an egg can be fertilized by a spermatozoid.

7 0
3 years ago
The right lymphatic duct drains ________. A) the right side of the body B) the right side of the head and thorax, and the right
zavuch27 [327]

Answer:

B

Explanation:

The right lymphatic duct drains the right side of the head, neck, and chest wall; it also drains the right lung and the lower half of the left lung, the heart, the dome of the liver, and the right diaphragm via the bronchomediastinal trunk.

8 0
3 years ago
Only answer if you know the answer
Volgvan

Answer:

B. A helicase enzyme unwinds the DNA molecule, then corresponding nucleotides are added to the separated original strand forming two separate semiconservative molecules

Explanation:

DNA Replication is an important phenomenon as far as cell division is concerned. It is the process whereby a DNA molecule doubles its content or forms two DNA molecules from one.

In the semi-conservative model of DNA replication, an enzyme called DNA helicase unwinds the double stranded DNA molecule into two single strands. The single strands are then used as template for DNA polymerase to synthesize another molecule of DNA. Hence, two separate DNA molecules comprising of one old strand and one new strand.

6 0
2 years ago
What book did Darwin propose that evolution occurs by means of natural selection
lozanna [386]
Origin of species by means of natural selection
4 0
3 years ago
In an ecosystem, a fungi, such as the mushroom pictured here, functions as a
TEA [102]
The answer is b sorry didn't see the picture but a fungi is a decomposer
3 0
3 years ago
Read 2 more answers
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