A student examines a periodic table.
Which inferences about sodium (Na) are true?

Answer:

hope this help

Explanation:

Nucleic acids are made up of chains of many repeating units called nucleotides (see bottom left of Figure 1 below). The DNA molecule actually consists of two such chains that spiral around an imaginary axis to form a double helix (spiral.)  Nucleic acid molecules are incredibly complex, containing the code that guarantees the accurate ordering of the 20 amino acids in all proteins made by living cells.  Surprisingly though there are only a few different nucleotides: only four different nucleotide units comprise DNA, the nucleic acid of interest to the genealogist.  

This figure is a diagram of a short stretch of a DNA molecule which is unwound and flattened for clarity. The boxed area at the lower left encloses one nucleotide.  Each nucleotide is itself make of three subunits:

A five carbon sugar called deoxyribose (Labeled S)

A phosphate group (a phosphorous atom surrounded by four oxygen atoms.) (Labeled P)

And one of four nitrogen-containing molecules called nucleotides . (Labeled A, T, C, or G)

Alternating sugar and phosphate units form the two sides of a ladder-shaped arrangement with the rungs or steps each formed by a pair of nucleotide bases. Figure 2 below shows the structural formula of DNA in greater detail. The nitrogen bases are ring compounds with their carbon and nitrogen atoms arranged in single or double rings.  Only certain bases can pair together to form base pairs.  In DNA, Adenine (A) always pairs with thymine (T), and guanine (G) always pairs with cytosine (C).  

Notice that in the two figures above, the two strands of a DNA molecule are antiparallel, that is, they run in different directions. The side of the chain on the left begins with a free phosphate group at the top and ends with a sugar molecule at the bottom.  In contrast, the complementary chain on the right begins at the top with a sugar molecule and ends at the bottom with a phosphate group.  

Happily, it is not necessary to hold the details of DNA structure in your mind at all times!   As the sugar and phosphate sides of the molecule are constant they are frequently represented by parallel lines.  Even better, each of the nitrogen bases is conveniently represented by the first letter of its name.  These conventions allow the simplified representation of the molecule shown in the figure below

Or, even easier, a section of a DNA molecule is often abbreviated to show the bases of just one strand:

A T G G C T A C

Knowing the base pairing convention of A always pairing with T and G always pairing with C makes the complementary strand of the molecule understood.  It is this feature of complementary base pairing that insures an exact duplicate of each DNA molecule will be passed to its daughter cells when a cell divides.

Answer: sperm.... egg.... zygote

Explanation: hope this helps

Answer: The sperm is the male sex cell.

The egg is the female sex cell.

A zygote forms as a result of fertilization.

Explanation:

Answer:

Explanation:

Chloroplasts are found in plant cells only because chloroplasts contain chlorophyll which is essential for photosynthesis. Chlorophyll traps sunlight and uses it to prepare food for plants by the process of photosynthesis.

Answer:

chloroplast are only found in plant cell because

it contain chlorophyll which is useful in making good for plants by trapping sunlight from

sun .

But animal don't need to make food so. they don't contain chloroplast in their cell

hope it helps

Answer:

The correct answer is - sea cucumber.

Explanation:

Hydra, aurelia, and sea anemone belong to Phylum - Coelenterata or cnidaria while sea cucumber is a member of echinoderms. Cnidaria is radially symmetrical, free-swimming or fixed, aquatic and solitary or colonial animals. While sea cucumber are animals like starfish or sea urchin.

They found on the seafloor and have pentaradial symmetry however, developes bilateral symmetry later.

Answer:

To other consumers.

Answer:

I think d is I thinks only

Answer:

answer is c

Explanation:

i'm on the same topic as you and hope im right

Explanation:

The brain, skin and bones are genetically related thru DNA.

Gene expression regulates differation of cells...

Answer:

She should immediately rinse or flush her eyes with water.

Explanation:

One of the most important precautionary measure to be taken when working with explosive chemicals in the laboratory is the use of safety goggles. However, in this case, Maria claimed that she could not see through the safety goggles and wore them on top of her head rather than over her eyes.

Maria accidentally splashed some chemicals into her eyes while trying to pour it into a beaker. The primary or initial response to this happening is to immediately FLUSH OR RINSE her eyes with water. This will flush away the chemical from her eyes before it can have its detrimental effect.

Answer:

proceed to the eye wash station, open her eyes, and rinse them for at least 15 minutes

Explanation:

Answer:

Due to the moths light color it won't be able to blend in with the darkly colored trees therefore being easily seen by predators.

Answer:

So, they do eat...they do reproduce...they are simple...and can move.

So if you were lazy and skipped a type of food mentioned or anything, please ask the entire question, with all the included words. This way I can evaluate from how/the way they say it.

Explanation:

By analyzing the DNA of two prehistoric dogs from Germany, an international research team has determined that their genomes were the probable ancestors of modern European dogs. The finding suggests a single domestication event of modern dogs from a population of gray wolves that occurred between 20,000 and 40,000 years ago.

Answer:

Explanation:

They take in carbon dioxide from the water and use the sunlight through the water and produce oxygen

Answer:

positive geotropism

Explanation:

The answer is positive geotropism

Answer:Prothrombin is transformed into thrombin by a clotting factor known as factor X or prothrombinase; thrombin then acts to transform fibrinogen, also present in plasma, into fibrin, which, in combination with platelets from the blood, forms a clot (a process called coagulation).

Explanation:

Hope this helps :) Can u plz mark me branliest

Answer:

is the largest fossil deposit in the world

contains the oldest known bat fossil

Explanation:

Hope it helps ✌️

Answer:

The correct answer would be -

FSH - used as fertility drugs to makes egg mature.

LS - stimulates the release of eggs.

Oestrogen - causes the lining of the womb to break down.

Explanation:

FSH is a hormone released from the pituitary gland and is the abbreviation of Follicle-stimulating hormone which controls the menstrual cycle and growth of eggs in ovaries. It is also used as a fertility drug that promotes the growth of eggs to mature it.

LS or Luteinising hormone is the hormone that is released from the pituitary gland and promotes the surge of the release of eggs.

Oestrogen is the hormone that helps females during puberty during the menstrual cycle to breakdown the lining of the womb.

Answer:

the answer is less than 5 minutes.

Explanation:

Hope this helped Mark BRAINLEST!!

Answer:

less than 5 minutes

Explanation:

Answer:

the image is blurry I cant see anything :((

Answer:

1. Molecule

2. Cell

3. Atom

4. Organelle

Explanation:

I was gonna explain the picture in the comments, but I couldnt see the words on the right. Im super sorry

Answer:

some illnesses that can affect your organ system are heart disease, asthma, and cancer

Answer:

Autoimmune hepatitis, Graves' disease, type 1 diabetes, and Cystic fibrosis.

Explanation:

Answer: Imma say In the light-dependent reactions, which take place at the thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water. The light-dependent reactions release oxygen as a byproduct as water is broken apart.The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH. ... The photosystems and electron transport chain components are embedded in the thylakoid membrane.

Hope this helps have a awesome night/day❤️✨

Explanation:

Answer: The energy in the light helps create glucose with the help of Carbon Dioxide and Water

(Hope this helps)

Answer:

true

hope this helps

have a good day :)

Explanation:

Answer:

dweqdf ejlff

Explanation:

Look at the other answer