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Nonamiya [84]
2 years ago
11

What structure keeps food and water from entering the frog's lungs?

Biology
1 answer:
slega [8]2 years ago
7 0
Is called the Glottis. Hope this helps:)
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Where do DAG and IP3 originate?
cupoosta [38]

Answer:

Option (4).

Explanation:

Phosphatidylinositol4,5-bisphosphate (PIP2) is the phospholipid present in plasma membrane. This lipid is important for the cell communication and cell signalling process.

The PIP2 can cleave and give two main products are DAG (diacylglycerol) and IP3 ( inositol 1,4,5-trisphosphate). These two molecules are important for the cell signalling.

Thus, the correct answer is option (4).

8 0
2 years ago
How does the fossil record show that species change over time
Tasya [4]

It shows the evolution of an being. "Fossil record, history of life as documented by fossils, the remains or imprints of the organisms from earlier geological periods preserved in sedimentary rock." from https://www.britannica.com/science/fossil-record

3 0
2 years ago
In fast-twitch oxidative-glycolytic fibers, their rapid increases in force rely on the ________ activity where rapid relaxation
Kitty [74]

Answer:

1. myosin ATPase

2. Ca2+-ATPase

Explanation:

ATPase activity of myosin head hydrolysis ATP and energize the myosin head. The energized myosin head forms cross bridges to facilitate the power stroke of muscle contraction. The fast-twitch oxidative-glycolytic fibers have the ability to produce ATP by aerobic respiration.  

These fibers have the  ATPase in their myosin heads that hydrolyze ATP three to five times faster than the myosin ATPase in slow fibers. This ensures the faster speed of contraction of these fast-twitch muscle fibers.

During their relaxation, Ca2+ ATPase pumps the calcium ions back to the sarcoplasmic reticulum. As the level of Ca2+ ions in the sarcoplasm decreases, calcium ions are released from troponin. Tropomyosin is allowed to cover the myosin-binding sites on actin and the muscle fiber relaxes faster.

4 0
2 years ago
In an experiment, Mendel grew 633 green pea plants with either wrinkled seed-coats (dominant) or smooth (recessive). If the rati
ikadub [295]

Answer:

B) 211

Explanation:

211 times 3 equals 633

3 0
2 years ago
Read 2 more answers
When conducting scientific research, any information that is found must be analyzed to determine its validity. Joel is a firm be
UkoKoshka [18]
The answer is <span>c. Cold and flu season occurs when the weather is cold, so there must be a connection.

Even though choices a. and b. could make sense, nothing in Joel's research implies the connection between the choices and cold. Therefore, this leaves choice c. as the right one. If cold and flu season occurs</span><span> when the weather is cold, there must be a connection between cold and cold weather.</span>
3 0
2 years ago
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