Answer:
the many classes of large biological molecules the many ways that monomers of each class of biological molecule can be combined into polymers
Answer:
a. Gametophytes of bryophytes
d. Sporophytes of seedless vascular plants
Explanation:
Bryophytes are non-vascular plants. The plant body is haploid gametophyte which is its dominant phase and bears sex organs. The gametophyte may be leafy as in moss and may be with thalloid as in liverworts.
Pteridophytes are seedless, true vascular plants. The plant body is the diploid sporophyte. The sporophyte is differentiated into true leaves, stem and roots.
Answer: The correct answer is Mitosis.
Mitosis is a type of cell division in which parent cell is converted into two daughter cells having same number of chromosomes as that of the parent cell.
It is divided into the following stages-
1) Prophase- It is the first phase of mitosis in which condensation of chromosomes ( clearly visible chromosomes with sister chromatids) takes place and the nuclear membrane is disappeared.
2) Metaphase- It is the second phase in which chromosomes are aligned at the equatorial plate of the cell and they are anchored by microtubules from opposite poles.
3) Anaphase- It is the third phase in which each sister chromatid of the chromosome is pulled apart ( with the help of microtubules) towards the opposite pole.
4) Telophase- Chromosome decondensation takes place and nuclear membrane is formed so that two nuclei are visible now.
5) Cytokinesis- It is the last phase of mitosis in which division of cytoplasm takes place so that two daughter cells are produced having same number of chromosomes as their parent cell.
Given:
Measure of box reported by Cristal = 18 cubic units
Measure of box reported by Kyle = 48 cubic units
To find: The reason behind the discrepancies in their reporting.
Answer:
The measurement has been done in 'cubic units'. This indicates that they are measuring the volume of the box. Now, the differences in their reporting can be due to the following reasons:
- Unit of measurement: Cristal might have reported in imperial units whereas Kyle must have used metric units. Example, an inch is greater than a centimeter.
- Instrument used for measurement: Either Cristal or Kyle are using a non-standardized instrument for recording measurements. The unit spacing between, say Kyle's instrument might be smaller than that of Cristal's. They need to check it against a standard ruler to standardize their rulers.
- Least count error: Instruments with a greater least count or bigger gradations are prone to errors than instruments with a smaller least count. Example, a ruler with a least count of 1 inch will not be able to record in decimal units whereas a ruler with a least count of 1 mm can make fine recording.
- Rigidity of box: If the box can shrink under different environmental conditions then there will inconsistencies in their recording. Cristal must have recorded its volume in cold temperature whereas Kyle must have recorded its volume in hot temperature. (<em>sounds odd but is true</em>)
<span>B. Marsupials. </span>Amniotic eggs is a unique kind of egg because they possess a semipermeable shell to protect the egg but it also allows gas exchange. Inside an amniotic egg contains the amnion, chorion and allantois. Animals that lay amniotic eggs are called amniotes, which include reptiles, birds, dinosaurs, monotremes (platypus).
