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notsponge [240]
4 years ago
12

List 3 risks of second hand smoke exposure for children

Biology
2 answers:
9966 [12]4 years ago
7 0
Respiratory infections
Severe asthma attacks
Ear infections
Slav-nsk [51]4 years ago
5 0
<span>Respiratory problems, such as bronchitis and pneumonia</span>
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What is a characteristic of all chordates at some point during their life cycle?
Mila [183]

Answer:they possess notochord,dorsal tubular nerve cord , pharyngeal pouches

Explanation:chordates are animals which possess the notochord.examples are humans,birds,fishes etc

At a time in the life cycle,a chordates possesses a stiff,dorsal rod which is supporting in nature (the notochord).

They also possesses a tail that extends from behind the anus.

They possess a hollow nerve cord.

They possess gills slit.

These characteristics are present developing embryo and may disappear as the embryo matures.

In humans,the notochord is replaced by the spinal column of the vertebrate.

3 0
3 years ago
How does the polarity property make hydrogen bonds between water molecules possible?
Snowcat [4.5K]

Answer:

The two hydrogen atoms and one oxygen atom within water molecules (H2O) form polar covalent bonds. ... As a result of water's polarity, each water molecule attracts other water molecules because of the opposite charges between them, forming hydrogen bonds.

Explanation:

4 0
4 years ago
The diagram shows two charged objects, A and B.
dybincka [34]

Answer: The charges of the objects are A: Positive and B: Negative.

Explanation-

The electric field lines are pictorial representation of the electric field in terms of imaginary lines.

The direction of electric field is away from the positive charge and is directed towards the negative charge.

In this question, the electric field lines are emerging from A and coming towards B.

Thus, the right answer is A: Positive and B: Negative.

4 0
4 years ago
Read 2 more answers
What is the function of the cell membrane
swat32
It's pretty straight foward it controls what gets in and out

Cell Membrane - The membrane of the cell forms an outer shell that protects it. It's function is to be semi-permeable, which means that it separates the cell from outside elements and only allows certain molecules in.

Centrosomes<span> - Centrosomes organize microtubules, which are like hollow rods that give the cell its support and shape.</span>

Centrioles -<span> Centrioles are cylinders made of proteins that are found in a cell's centrosome.</span>

<span>Cytoplasm </span>- This is the jelly-like substance that makes up the inside of the cell. It's not an organelle, but a material that can be found within the membrane.

<span>Endoplasmic Reticulum </span>- The endoplasmic reticulum, or ER for short, forms the transport system for the important proteins in the cell, like RNA. ER can be split into two groups: smooth ER and rough ER.

Golgi Complex<span> - The Golgi complex, which is also known as the Golgi apparatus and named after the person who found it, is like the post office or packing center of the cell. It prepares proteins that need to be shipped off to specific destinations.</span>

<span>Lysosomes </span>- Lysosomes are enzyme-filled sacs that digest nutrients and cell wastes.

<span>Mitochondria </span>- This organelle has an important job. It keeps the rest of the cell going by supplying energy in the form of adenosine triphosphate (or ATP).

<span>Nucleus </span>- The nucleus is a soft sac of the cell that has the responsibility of carrying its genetic code (also known as DNA).

<span>Nucleolus </span>- Within the nucleus is another nucleus, or nucleolus, where RNA is formed. RNA carries the messages or instructions that DNA provide.

Ribosomes<span> - After RNA leaves the nucleolus and nucleus, it goes through the endoplasmic reticulum to the ribosomes, where protein synthesis takes place.</span>

7 0
4 years ago
Read 2 more answers
Which of the following shows the organizational level of a biome from the broadest category to the most specific category? A. bi
Pavlova-9 [17]

Answer:

D

Explanation:

Biomes are large divisions on earth based on climatic patterns, soil types, and the animals and plants that inhabit an area. Examples are aquatic and desert biomes

Ecosystems are interactions between communities (biotic elements) and abiotic elements in their environment.

A population is made up of individuals of the same species

8 0
3 years ago
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