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elena55 [62]
2 years ago
14

1. When inspecting a heating system, you should always A. try to operate the system regardless of the conditions. B. open readil

y accessible access panels. C. operate the automatic safety controls. D. ignite solid-fuel pilots.
Biology
2 answers:
Stolb23 [73]2 years ago
3 0
Its either b or c i would go w b tho
eduard2 years ago
3 0

Answer:

Option C, operate the automatic safety controls

Explanation:

A heat system must be inspected for the following automatic safety features -

A) automatic fire-extinguishing system - a system  that automatically detects a fire and discharges something to stop it

B) Automatic sprinkler system - A sprinkler system for fire-protection purposes

c) humidistat - to automatically control relative humidity

d) Automatic panel board

e) thermostat to  automatically  maintain temperature

f) an automatic water pump  for removal of waste water

Hence, the automatic systems must be verified at  the time of inspection for ensuring safety at the time of crisis.

Hence, option C is correct

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When igneous rock is formed,the size of the rock crystals or grains is primarily dependent on
Vedmedyk [2.9K]

Answer:

The three factors that influence the textures of igneous rocks are the speed of cooling, the silicate content, and the water content.

Igneous rocks contain randomly arranged interlocking crystals. The size of the crystals depends on how quickly the molten magma solidified: magma that cools slowly will form an igneous rock with large crystals. lava that cools quickly will form an igneous rock with small crystals. When magma cools, crystals form because the solution is super-saturated with respect to some minerals. If the magma cools quickly, the crystals do not have much time to form, so they are very small. If the magma cools slowly, then the crystals have enough time to grow and become large.

3 0
2 years ago
Each chromosome has genes that control wing shape, body color, antenna type, and eye color.
OLEGan [10]

Answer:

The correct answer is - True.

Explanation:

In a simplified drosophila or fruit fly genome, Each chromosome of the homologous pair of chromosomes has the genes for the body color, wing shape, antenna type, and eye color, and all are located on the same chromosome.

So on the basis of the explanation given above it is clear that in Drosophila or fruit flies it is true that Each chromosome has genes that control wing shape, body-color, antenna type, and eye color.

5 0
3 years ago
In corn, small pollen (sp) is recessive to normal pollen (sp+) and banded necrotic tissue, called zebra necrotic (zn), s ssive t
alex41 [277]

Answer:

Option B

Explanation:

Please see the attached image

Given -

Allele for small pollen is "sp"

Allele for normal pollen is "sp+"

and "sp+" is dominant over "sp"

Allele for zebra necrotic tissue is "zn"

Allele for normal necrotic tissue is "zn+"

and "zn+" is dominant over "zn"

Cross is carried out between

sp+ sp zn+ zn x sp+ sp zn+ zn

The gametes of the parent cells are -

sp+ zn+, sp+zn, spzn+, spzn

The cross would be as follows

         

sp+ zn+ sp+zn spzn+ spzn

sp+ zn+ sp+ sp+ zn+ zn+sp+ sp+ zn+ znsp+ sp zn+ zn+ sp+ spzn+ zn  

sp+zn sp+ sp+ zn+ znsp+ sp+ zn znsp+ sp zn+ zn sp+ sp zn zn

spzn+ sp+ sp zn+ zn+sp+ sp zn+ znsp sp zn+ zn+ sp sp zn+ zn

spzn sp+ sp zn+ zn sp+ sp zn zn sp sp zn+ zn sp sp zn zn

Hence, option B is correct

7 0
3 years ago
Both the hair and skin contain keratin. When comparing the hair shaft to the skin which layer of the epidermis is most similar?
Paha777 [63]

Answer:straum and straum

Explanation:

they both have the same name

3 0
2 years ago
Any change or random error in a DNA sequence
Sever21 [200]
Any change or random error in a DNA sequence is called a mutation.
7 0
3 years ago
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