Ions are atoms which have a missing electron or an extra one. This is what gives the ion its positive or negative electrical charge. Isotopes are atoms which contain a different number of neutrons.
I’m not completely sure but I believe it’s the Scalpel.
Answer:
<u>D. Segmented worms may be covered in setae.</u>
Explanation:
Setae are hair like structure structures present only in segmented worms such as earthworms. It prevents earthworms to slip back from the surface. Setae are absent in Roundworms and Flatworms.
Other options in the question can be common in all of these Worms.
Answer:
Explanation:
If the investigator wishes to watch the movement of C. Elegans (a roundworm), then he should be using compound microscopes. These microscopes are light illuminates and image that can be perceived is a two dimensional. Using this would allow you to magnify to a certain level so you can view individual cells and even cells that are living and moving. Typically compound microscopes can magnify up to 1000 times magnification. It has two convex lenses which has short focal lengths to allow a much higher level of magnification as compared to a simple microscope. These lenses are called the ocular lens and the objective lens.
The diploid chromosome number is double the haploid chromosome number. So if the haploid number is 14, the diploid number is 28.