The headings complete the table are X = waxes and Y = sterols; option A.
<h3>What are lipids?</h3>
Lipids are fatty, oily, or waxy water-insoluble substances found in living organisms.
Lipids are of many classes and types and they perform several functions in the body.
Some classification of lipids are given below:
Waxes:
- prevent dehydration of plants
- are a protective layer on hair or feathers
- are tightly packed fatty acid chains joined to long-chain alcohols
Sterols:
- are found in cell membranes of plant and animal cells
- consist of four carbon rings with no fatty acids
- serve a role in aiding fat digestion
In conclusion, lipids are important biomolecules found in the body.
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Course adjustment is a type of knob used to focus and bring the object in the microscope.
Option (c);
<u>EXPLANATION: </u>
- There are different powers of Objective lenses on a microscope.
- The shortest lens is of the lowest power and the longest one is of the largest power.
- We start by rotating the objective lens from the lower power and the coarse adjustment knob is used to focus on the object.
- On both sides of the microscope, we can see this knob and it moves the plate (the place where slides are placed for observation) top to bottom and brings the object into focus.
Meiosis in reproductive organs (testes and ovary) produce gametes. Each human cell including reproductive cells contains 23 pair of chromosomes. Meiosis separates the two chromosomes from each pair thus, each gamete receives only one copy of each chromosome. Therefore, each gamete has 23 new chromosomes, one from each of the 23 pairs. During meiosis, exchange of chromosome segment between copies of a pair of chromosomes. The exchange of chromosome segments creates new combinations of genes which enhances genetic variability within a species.
La respuesta es: su velocidad es 2.66 km/h, equivalente a 0.738 m/s.
Explanation
Para conocer la velocidad de una persona que recorrió 4 km luego de caminar durante una hora y media es necesario dividir la distancia (en kilómetros) total en el tiempo (en horas). Entonces la operación sería:
4km/1,5h = 2.66 km/h.
Posteriormente, para convertir 2.66 km/h en m/s es necesario aplicar la siguiente formula
2.66 km/h *(1000 m/1 km)*(1 h/3.600 s) = 0.738 m/s.
Yes, of course! They may not always realize that instead of helping sometimes they're harming. They could push their child into a school that can help them for the future even though they want to try a different school. They can annoy their child and they'll get sick of it and lose interest in their subject.
