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2 years ago

All of the oxygen that we breathe is produced by plants. a. True b. False

Biology

1 answer:

myrzilka [38]2 years ago

6 0

Answer:

The given statement is true.

Explanation:

The oxygen that is present in the atmosphere has two main sources:

Terrestrial Plants: As we know that the plants make use of sunlight, water, carbon dioxide and chlorophyll in a process termed as photosynthesis and make glucose and releasing oxygen into the atmosphere which is then used by animals for respiration. This is one of the major source of oxygen in the atmosphere.

Oxygen released from Oceans: In the oceans of the earth, water bodies ,seas tiny plants termed as Phytoplankton are present that are present near the surface of the water bodied that also release oxygen by photosynthesis and account for about 50% of the world's oxygen supply.

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A) Compare and contrast diffusion, passive transport (diffusion & facilitated), primary active transport and secondary activ

zheka24 [161]

Answer:

Passive transport: It does not need any energy to occur. Happens in favor of an electrochemical gradient. Simple diffusion and facilitated diffusion are kinds of passive transport.

Simple diffusion: molecules freely moves through the membrane.

Facilitated diffusion: molecules are carried through the membrane by channel proteins or carrier proteins.

Active transport needs energy, which can be taken from the ATP molecule (Primary active transport) or from a membrane electrical potential (Secondary active transport).

Explanation:

Diffusion: This is a pathway for some small polar hydrophilic molecules that can freely move through the membrane. Membrane´s permeability depends on the size of the molecule, the bigger the molecule is, the less capacity to cross the membrane it has. Diffusion is a very slow process and to be efficient requires short distances and pronounced concentration gradients. An example of diffusion is osmosis where water is the transported molecule.

Facilitated diffusion: Refers to the transport of hydrophilic molecules that are not able to freely cross the membrane. Channel protein and many carrier proteins are in charge of this passive transport. If uncharged molecules need to be carried this process depends on concentration gradients and molecules are transported from a higher concentration side to a lower concentration side. If ions need to be transported this process depends on an electrochemical gradient. The glucose is an example of a hydrophilic protein that gets into the cell by facilitated diffusion.

Simple diffusion and facilitated diffusion are passive transport processes because the cell does not need any energy to make it happen.

Active transport occurs against the electrochemical gradient, so it does need energy to happen. Molecules go from a high concentration side to a lower concentration side. This process is always in charge of carrier proteins. In primary active transport the energy needed comes from the ATP molecule. An example of primary active transport is the Na-K bomb. In secondary active transport, the energy comes from the membrane electric potential. Examples of secondary active transport are the carriage of Na, K, Mg metallic ions.

7 0

2 years ago

Which form of cell division results in an enlarged germ cell pool?.

kenny6666 [7]

Mitosis form of cell division marks in an enlarged germ cell pool, Mitosis is a procedure where a single cell splits into two identical daughter cells (cell division).

<h3>What is mitosis and meiosis?</h3>

There are two kinds of cell division: mitosis and meiosis. Most of the time when people refer to “cell division,” they mean mitosis, the procedure of making new body cells.

Meiosis is the kind of cell division that creates egg and sperm cells. Mitosis is a actual procedure for life.

Thus, Mitosis form of cell division marks in an enlarged germ cell pool, Mitosis is a procedure where a single cell divides into two same daughter cells.

To learn more about Mitosis click here:

brainly.com/question/26678449

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4 0

1 year ago

Dimples are dominant. A dimpled man and a non-dimpled woman have 10 children, all dimpled. We might be tempted to assume that th

Nitella [24]

DD is homozygous dominant, the dominant allele will shown so they will have dimples.

<h3>Homozygous dominant:</h3>

When an organism is homozygous, it contains two copies of the same allele for a gene.
When two copies of the same dominant allele or two copies of the same recessive allele are present in an organism, it is said to be homozygous dominant or homozygous recessive.
Homozygosity is the presence of two dominant alleles (AA) or two recessive alleles (aa).
The recessive allele is suppressed by the dominant one.

Heterozygous dominant:

The two distinct alleles in a heterozygous genotype interact with one another. This controls how their characteristics are shown.
This encounter frequently centers on dominance.
The stronger allele is referred to as "dominant," whilst the weaker allele is referred to as "recessive." The dominant allele covers up this recessive one.

Learn more about homozygous dominant here:

brainly.com/app/ask?q=homozygous+dominant%2BVERIFIED+ANSWERS

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1 year ago

Why might it be easy to overlook cancer in its early stages

Talja [164]

Answer:

Explanation:

So that it can be better for the person

7 0

2 years ago

All genetic information is stored in DNA are divided into units called ____

rusak2 [61]

Okay, biology isn't exactly my strongest subject (it never has been), but I'm pretty sure the answer is nucleotides. DNA is made up of nucleotides. Each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. There are four different nitrogen bases: adenine (A), thymine (T), guanine (G), and cytosine (C). A always pairs with T, and G always pairs with C.

4 0

2 years ago