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Olin [163]
3 years ago
7

What variables should the scientists control in the experiment

Biology
1 answer:
Drupady [299]3 years ago
6 0

Answer:

It's important for a scientist to try to hold all variables constant except for the independent variable. If a control variable changes during an experiment, it may invalidate the correlation between the dependent and independent variable. When possible, control variables should be identified, measured, and recorded.

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The smooth muscle that alters the diameter of the pupil is the
Liono4ka [1.6K]

Answer:

Circular and Radial muscles.

Explanation:

The pupilarry response is the variation of pupil's size due to a variety of causes (exposure to light, sexual stimulation, drugs) and it consists of two movements, constriction and dilation.

<em>The constrict response occurs thanks to the circular muscle and the dilations is triggered by the radial muscle, both of them are smooth muscle.</em>

I hope you find this information useful and interesting! Good luck!

7 0
4 years ago
PLS HELP IVE BEEN ASKING FOR 2 DAYS OML NOBODY WILL HELP ;( ME GO CRY
ruslelena [56]

Answer:

A.

Explanation:

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8 0
3 years ago
Read 2 more answers
Name the tissue that water travels up from the roots to shoots in a deciduous tree.
Leviafan [203]

The tissue that water travels up from the roots to shoots in a deciduous tree is xylem.

<h3>What is xylem?</h3>
  • Xylem is one among the two types of transport tissue in vascular plants, the opposite being phloem.
  • Transport water from roots to stems and leaves is the main function of xylem, but it also transports nutrients.
  • The word xylem springs from the Ancient Greek word ξύλον (xylon), meaning "wood"; the best-known xylem tissue is wood, though it's found throughout a plant. The term was introduced by Carl Nägeli in 1858.
  • The long tracheary elements are the most distinctive xylem cells that transport water. Tracheid and vessel elements are distinguished by their shape; vessel elements are shorter, and are connected together into long tubes that are called vessels.

To learn more about xylem: brainly.com/question/12813346

#SPJ4

5 0
2 years ago
The nonliving things in an environment are called __________.
Varvara68 [4.7K]
The answer would be B. Abiotic Factors. The prefix a means not, so a biotic means not alive. Hope that helped :D
3 0
3 years ago
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Unlike mitosis, meiosis results in the formation of
ANTONII [103]
Haploid cells
(4 differently genetic haploid cells to be specific)
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3 years ago
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