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Nitella [24]
3 years ago
13

Groups of five plants are given 1, 2, and 3 grams of nitrate and 1, 2, and 3 grams of phosphate in all combinations over a perio

d of one month. The researcher measures plant height and weight at the end of the experiment. What is missing in this experimental design?
Question 9 options:

a control

an independent variable

a dependent variable

a constant
Biology
1 answer:
snow_tiger [21]3 years ago
3 0

Answer:

a control

Explanation:

you need something to compare it to to see if anything happens

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cluponka [151]
<span>The tundra biome is the least diverse in terms of plant species of all land biomes. The rainforest is the most diverse in terms of plane species of all land biomes.</span>
6 0
3 years ago
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True or false: coccidioides immitis is a member of domain bacteria.
Ksivusya [100]

False

Coccidioides immitis is not a member of domain bacteria.

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7 0
3 years ago
Reagan is a young girl with a genetic developmental disorder. Her language development has been severely affected by this condit
gtnhenbr [62]

Answer:

Option D

Explanation:

Complete question

Reagan is a young girl with a genetic developmental disorder. Her language development has been severely affected by this condition, and as such she has been diagnosed with a specific language impairment. Which condition is NOT likely to have contributed to this delay?

A) autism spectrum disorder

B) Down syndrome

C) fragile-X syndrome

D) PKU

Solution

Phenylketonuria (PKU) is a kind of genetic disorder in which body starts producing and building up phenylalanine amino acid. PKU arises when the Phenylalanine hydroxylase enzyme is not synthesized due to a genetic defect thereby affecting creation of neurotransmitters such as epinephrine, norepinephrine, and dopamine. Some of the symptoms of this disorder are hyperactivity, seizures, eczema, tremors etc. PKU is not connected with language development issues and hence correct option is D

4 0
3 years ago
What results when a type a patient receives a transfusion of type b blood?
aleksley [76]
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Points
lapo4ka [179]

Answer:

<em>The name for a complex group of organisms is system Hope this helps!</em>

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