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amid [387]
2 years ago
10

please help :) good morning :) For which of these questions could a testable hypothesis be developed? Check all that apply. Do c

hildren’s heart rates increase at the same speed when walking uphill? Is experimenting with moldy bread more fun than experimenting with yogurt cultures? Does temperature affect how long blood can be stored? How does moisture affect the growth of moss on a tree? Which of Leeuwenhoek’s microscopes was the coolest?
Biology
1 answer:
Olin [163]2 years ago
8 0

Answer:

peace be upon you dear

Explanation:

The sinus node signals the heart to speed up during exercise or in situations that are stressful, frightening or exciting. For example, a 10- to 15-minute brisk walk typically elevates the heart rate to 110 to 120 beats per minute

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We are usually least consciously aware of the processes and functions of which brain structure?
Kazeer [188]

Answer:

The answer is Brain Stem.

Explanation:

The brain part that we are least consciously aware of is the brain stem and the reason is because of how it operates and it's functions.

The brain stem is the part of the brain that is located at the end and controls the message flow between our body and our brain. It also regulates our physiological processes such as heart rate, blood pressure, breathing etc. without our notice.

I hope this answer helps.

8 0
2 years ago
What may a salesperson say when you enter a store?
muminat

Answer : Option D) en que puedo servirle


Explanation : Anytime if someone enters into a store the sales person always asks for the requirement of the customer's demand in spanish it will be en que puedo servirle. It is a good gesture for gaining more customer satisfaction of a particular store.

7 0
2 years ago
Read 2 more answers
The electric resistance pyrometer operates under the principle that an increase in temperature will cause an increase in the res
tatyana61 [14]

Answer:

operates om the principle of temperature-induced resistance.

Explanation:

In physical quantities, the resistance of an electrical conductor can be correlated directly with the temperature of the material. The property for the change in the resistance with temperature is called the temperature coefficient of resistance. Mathematically, the resistance of a material is given as follows:

R = R_{ref} [ 1 + \alpha (T - T_{ref})]

where R = conductor resistance at the temperature T.

Rreff = the conductor resistance at the reference temperature,

\alpha = temperature coefficient of resistance

T = Conductor temperature

Treff = reference temperature of the material.

From the equation, it can be seen that a positive coefficient for a material means an increase in the resistance of the material.

4 0
2 years ago
Platinum (Pt) is in the 78th position in the periodic table. A neutral atom of the element that comes just before platinum in th
Sergeu [11.5K]
The ansseer is Iridium.

The atomic number of iridium is 77 and it comes just before platinum (atomic number = 78).

In iridium,

The number of electrons = no. Of protons = 77.
The no. Of electrons and the no. Of protons is same as atomic number.
4 0
2 years ago
Read 2 more answers
In mammoths, assume that spotted skin (S) is dominant over non-spotted skin (s) and that wooly hair (W) is dominant over non-woo
lisabon 2012 [21]

Answer:

Genotypic and Phenotypic ratios → 1:1:1:1

  • 25% of the progeny is expected to be SsWw, exhibiting spotted skin and wooly hair, SsWw
  • 25% of the progeny is expected to be Ssww, exhibiting spotted skin and non-wooly hair, Ssww
  • 25% of the progeny is expected to be ssWw, exhibiting non- spotted skin and wooly hair, ssWw
  • 25% of the progeny is expected to be ssww, exhibiting non-spotted skin and non-wooly hair, ssww

Explanation:

<u>Available data</u>:

  • spotted skin (S) is dominant over non-spotted skin (s)
  • wooly hair (W) is dominant over non-wooly hair (w)
  • Cross: heterozygous spotted, non-wooly mammoth with a heterozygous wooly-haired, non-spotted mammoth.

Parentals) Ssww   x   ssWw

Gametes) Sw, Sw, sw, sw

                 sW, sW, sw, sw

Punnett square)     Sw            Sw           sw           sw

                  sW      SsWw      SsWw      ssWw     ssWw

                  sW      SsWw      SsWw      ssWw     ssWw

                  sw      Ssww       Ssww       ssww      ssww

                  sw      Ssww       Ssww       ssww      ssww

F1) 4/16 = 1/4 = 25% of the progeny is expected to be SsWw, exhibiting spotted skin and wooly hair

    4/16 = 1/4 = 25% of the progeny is expected to be Ssww, exhibiting spotted skin and non-wooly hair

    4/16 = 1/4 = 25% of the progeny is expected to be ssWw, exhibiting non- spotted skin and wooly hair

    4/16 = 1/4 = 25% of the progeny is expected to be ssww, exhibiting non-spotted skin and non-wooly hair.

Genotypic and Phenotypic ratios → 1:1:1:1

7 0
2 years ago
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