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USPshnik [31]
3 years ago
12

________ are characterized by stinging cells used for defense and for capturing prey. A. Roundworms B. Cnidarians C. Sponges D.

Annelids
Biology
1 answer:
BigorU [14]3 years ago
4 0

Cnidarians are characterized by stinging cells used for defense and for capturing prey.

Answer: B. Cnidarians

Cnidarians are animals which have specials cells known called 'cnidocytes', these are stinging cells. Cnidarians also have organelles called 'nematocysts'. Nematocysts are stringers that are primarily used to capture prey and for defense.

I hope this helps!

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Similarities between cockroaches and spider​
Marta_Voda [28]

Answer:

not similar because spiders have eight legs and cockroaches have six legs and their have wings

6 0
3 years ago
What ions, ATP, and neurotransmitters are used in muscle contraction and where are they used??
vivado [14]

Answer:

Hiya there!

Explanation:

ATP then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site. ATP can then attach to myosin, which allows the cross-bridge cycle to start again; further muscle contraction can occur.

acetylcholine : Skeletal muscle contraction and changes with exercise. (A) Neurotransmitter (acetylcholine, ACh) released from nerve endings binds to receptors (AChRs) on the muscle surface.

The muscle contraction cycle is triggered by calcium ions binding to the protein complex troponin, exposing the active-binding sites on the actin. As soon as the actin-binding sites are uncovered, the high-energy myosin head bridges the gap, forming a cross-bridge.

Credit sourced from "bio.libretexts.org"

Hope this <em><u>Helped!</u></em> :D

4 0
3 years ago
Sample Response: The sound of the drumstick hitting the metal bar will get to me in a shorter amount of time in Scenario 1. The
maks197457 [2]

Answer:

The sound will reach my ear in a shorter time in Scenario 1.

The speed of sound waves in solids is faster than it is in gases.

Explanation:

The sound which is produce due to hitting of metal bar with a drumstick reaches to the ears in short time because sound is a longitudinal wave which requires or needs medium for its propagation from one place to another and in solids the particles of medium are close to each other as compared to air so the sound travels faster in solid materials as compared liquid and gases and takes less time to reach my ears.

7 0
4 years ago
The olfactory cells are
Lina20 [59]
The answer would be A

Because

The sense of smell is part of our chemical sensing system, or the chemosenses. Sensory cells in our nose, mouth, and throat have a role in helping us interpret smells, as well as taste flavors. Microscopic molecules released by the substances around us (foods, flowers, etc.) stimulate these sensory cells. Once the cells detect the molecules they send messages to our brains, where we identify the smell. Olfactory, or smell nerve cells, are stimulated by the odors around us--the fragrance of a gardenia or the smell of bread baking. These nerve cells are found in a small patch of tissue high inside the nose, and they connect directly to the brain. Our sense of smell is also influenced by something called the common chemical sense. This sense involves nerve endings in our eyes, nose, mouth, and throat, especially those on moist surfaces. Beyond smell and taste, these nerve endings help us sense the feelings stimulated by different substances, such as the eye-watering potency of an onion or the refreshing cool of peppermint.
7 0
4 years ago
Describe an experiments to show that ochaled air <br>Cartain carbon dioxide​
elena-s [515]

Answer:

Let's find out if exhaled air contains carbon dioxide.

Take a glass and fill it up with some limewater. ... The limewater turns milky. This goes to show that the carbon dioxide present in the exhaled air turns the limewater chalky. The limewater turns from clear and colourless to chalky.

Explanation:

7 0
3 years ago
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