Harmful algal blooms are a result of what type of pollution?

Where does the exchange of oxygen (from the air) with carbon dioxide (from the cells) take place?

Katen [24]

Answer:

The Answer is Option D. 

Exchange of respiratory gases, oxygen and carbon dioxide take place in the alveoli of the lungs. Oxygen which is inhaled from the atmosphere diffuses through the walls of the alveoli and reaches to the adjacent capillaries into the red blood cells.

8 0

3 years ago

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What is the function of the nucleolus a. storage of dna?

kifflom [539]

That's the function of the nucleus.

The nucleolus makes ribosomal subunits from proteins and ribosomal RNA, also known as rRNA. ... Ribosomes make proteins; therefore, the nucleolusplays a vital role in making proteins in the cell. Function of the Nucleolus. Ribosomes are made of two subunits, a large and a small

5 0

3 years ago

Predict phenotypes associated with nondisjunction of sex chromosomes.

Mnenie [13.5K]

Answer: The new daughter cells will have an abnormal amount of genetic material. That is called aneuploidy and it is the presence of an abnormal number of chromosomes. Different clinical conditions are the result of this nondisjunction.

Explanation:

Normal cells are diploids, that means they have two copies of each gene, one of each chromosome. So normal cells have two homologous chromosomes, one from each parent.

During anaphase of cell division, each pair of chromosomes is separated by the mitotic spindle. The separated chromosomes are then pulled by the spindle to opposite poles of the cell, and eventually will end up in the new daughter cells.

Nondisjunction is the failure of homologous chromosomes to separate properly during cell division, so it is the miss segregation of them. The new daughter cells will have an abnormal amount of genetic material. Different clinical conditions are the result of this nondisjunction.

Sex chromosomes participates in sex determination of an individual. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY) So nondisjunction of sex chromosomes could be:

XX: one cell with no chromosome and the other cell with two X chromosomes.
XY: one cell with no chromosomes and the other cell with XY chromosomes.

According to which gametes are fused during fertilization, different phenotypes can be given. For example, if a gamete with one chromosome fuses with another gamete with two chromosomes, the result will be an individual with three chromosomes (it could be XXY, or XXX) called trisomy.

Triple X syndrome is characterized by an extra X chromosome in females. Those affected are often taller than average, but most females have a normal sexual development. Klinefelter syndrome is known XXY individuals, and it causes infertility in males, breast growth, less body hair and weaker muscles.

And if a gamete with no chromosome fuses also with another gamete with no chromosome, the result is a nullisomy. But due to the lack of genetic material, the nullisomic gametes are rendered unviable for fertilization.

And if a gamete with no chromosome fuses with another gamete with one chromosome (normal) the result is a monosomy, the presence of only one chromosome from a pair. The result can be an individual who is X or Y. People with Turner syndrome have one X chromosome and it is the only monosomy that is seen in humans because other cases monosomy are lethal.

Any of those examples is called aneuploidy and it is the presence of an abnormal number of chromosomes.

3 0

3 years ago

Which of the following is not a common teratogen? a. HIV infection b. SSRI antidepressant medications c. Folic acid d. Alcohol

poizon [28]

Option C

Folic acid is not a common teratogen

Explanation:

Teratogen - Any factor that can interrupt the growth of a fetus or embryo. Teratogens may generate a birth deformity in the child. Or a teratogen may terminate the pregnancy unmitigated. The aspects of teratogens include radiation, parental infections, drugs.

Alcohol exploitation can produce mental obstacles, distortion, germination obstacles, miscarriage, and behavioral complications in newborns. Women who have not taken the hepatitis B vaccine should be held for immunization if they are at danger of sexually dispatched disease or blood appearance. The vaccine may be administered during pregnancy. SSRI antidepressant medications is also a factor of teratogen to cause deformity to fetus growth.

6 0

3 years ago

All organisms must have water for survival. If a drought causes the water in an ecosystem to become scares the organisms in this

strojnjashka [21]

Answer:

C, a decrease in metabolic activity

Explanation:

In times of drought, there would be a reduction in the metabolic activity of an organism.

Most organisms found in very dry climates have adaptation to accommodate a period of drought.
Water is essential for the metabolic processes in an organism.
A deficiency of water will reduce these life activities.
The organism can become inactive as a result of this.

3 0

3 years ago