False. When using the 40X objective, you should not use the coarse adjustment knob.
Explanation:
The coarse adjustment knob is used with lower power objectives if used at high powers the lens may get broken and also it would be difficult to attain desired focus. The coarse adjustment knob is used to attain the focus of the object by maintaining the distance between the object and the lens. This is the rough focus knob of the microscope and the focus of the object moves very quickly when using coarse adjustment.
Land plants are evolved from green algae.
Green algae called charophytes are coolest relatives of land plants.
It is believed that land plants are the most closely related to green algae, more specifically, a group of green algae referred to as charophyceans. Not only do both land plants and green algae produce chlorophyll a and b, but other evidence suggests that there is a relationship as well.
4 key traits that appear in nearly all land plants but are absent in the charophytes.
-Diploid embryos
- The ability to photosynthesize
-Apical meristem
-Walled spores produced in sporangia.
- Multicellular haploid and diploid generations
-Multicellular gametangia
Learn more about land plants and green algae here:
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Answer:
219 grams
Explanation:
Proteins are body building foods. They can be gotten from meat, beans, fish etc. When the body is out of energy, sometimes protein is utilized in place.
In a complete oxidation of 1 gram of protein 4 kcalories is being generated.
In our question, we are given that;
If a person consumed 35% of a diet = 0.35
providing that there are 2500 kcalories there, then the person have consumed (2500 × 0.35) kcalories of protein
= 875 kcalories of protein.
So, if 1 gram = 4 kcalories
∴ x gram = 875 kcalories
To find (x) which is the gram of protein that would be ingested, we have;
=
= 218.75 grams
≅ 219 grams
A catalyst increases the rate of reaction by decreasing the activation
energy. The correct answer is D. Catalysts are those substances that are
used in reactions to speed up the process. An example of a catalyst
might be iron, during the manufacture of ammonia within the Haber
process.
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