Answer:
1: A karyotype is created and used to identify possible chromosomal defects.
Explanation:
A karyotype is the observed characteristics (number, type, shape, position etc.) of the chromosomes of an individual or species within the nucleus of the cell (mainly eukaryotic). Karyotype tests are performed to show if an individual’s chromosomes are normal or not. The chromosomes (especially those in the white blood cells) are usually isolated, stained, and examined under the microscope. This detect if there is an abnormal chromosome, an extra chromosome or an incomplete chromosome. A karyotype can be used as a scientific report because possible chromosomal defects such as Down syndrome (trisomy 21), Klinefelter syndrome, Edwards syndrome and Turner syndrome can be identified using the Karyotype tests.
Answer:
1.True
2.True
3.True
4.True
5.True
6.True
7.True
8.True
9.False
10.True
Explanation:
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<h3>
Answer:</h3>
Antibiotics have no effect on them.
<h3>
Explanation:</h3>
- Viral pathogens are not effected by antibiotics
- Bacterial pathogens are effected by antibiotics
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Weathering breaks down and loosens the surface minerals of rock so they can be transported away by agents of erosion such as water, wind and ice. There are two types of weathering: mechanicaland chemical. Mechanical weathering is the disintegration of rock into smaller and smaller fragments.
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Answer:
C. transition points during the cell cycle that ensure all cellular components are functioning properly
Explanation:
Cell cycle is the series of events that occurs from the preparation of the cell for division to the actual division. Prior to this division, certain processes need to occur to ascertain that each daughter cell receives the correct number of chromosomes and that mistakes that can change the composition of the genetic material does not occur. With respect to this, the cell ensures that a cell with anomalies does not continue the division process in a control mechanism called CHECKPOINT.
Checkpoint is that transition point in which the progress of each stage of the cell cycle is monitored and corrected before proceeding. Checkpoints occur at the end of G1, G2 and Metaphase stages. In G1 checkpoint, the cell ensures all cells meet the requirements for their genetic material to be replicated in S-phase. If they do, they proceed. If some don't, the process may be paused till conditions are met.
In the transition from G2 and M phase, checkpoints are done to ascertain that all DNA in each cell has been replicated without errors.
In the Metaphase stage, checkpoints occurs to ensure that all sister chromatids are attached to spindle microtubules at their kinetochore in order to facilitate separation in the anaphase stage.
