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Arada [10]
3 years ago
11

in an investigation to determine a factor that affects the growth of rats a student exposed 100 rats of the same age and species

to identical conditions except for the amount of living space and the amount food each rat received. Each day the student measured and recorded the weight of each rat. State one major error that student made in performing this investigation.​

Biology
1 answer:
Strike441 [17]3 years ago
7 0

Answer:

he amount of living space for the rats and the amount of food are two different variable that will make a  mistake the student changed. If you're doing an experiment, you need to control the conditions and the only change ONE variable at a time of each one . If you want to know if the food and the living space affect weight, you should do two different experiments.

i hope this helps you out

have a great   morning

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How does a Calorie on a food label relate to a calorie that is produced in cellular respiration?
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8 0
3 years ago
In a dihybrid cross involving two autosomal traits on different chromosomes in which the parents are purebred for the opposite f
Simora [160]

Answer:

The question lacks options, the options are:

A) 1 out of 16

B) 3 out of 16

C) 6 out of 16

D) 9 out of 16

The answer is 1 out of 16

Explanation:

This is a DIHYBRID cross because it involves two different genes coding for distinct traits. One of the traits will be dominant while the other recessive. Hence, parents that are purebred for opposite forms of the trait means that one parent is homozygous dominant while the other is homozygous recessive. When these two parents cross, they produce F1 offsprings that all possess the dominant trait but heterozygous/hybrids.

When these hybrids are self-crossed, they produce four different combinations of gametes which when crossed using a punnet square will result in F2 offsprings with a 9:3:3:1 phenotypic ratio according to Mendel's observation.

9 represents offsprings that are dominant for both traits

The two 3's represents offsprings that are recessive for one trait and dominant for the other respectively.

1 represents offsprings that are homozygous recessive for both traits.

Hence, 1 out of 16 offsprings will be homozygous recessive for both traits.

4 0
3 years ago
Hen current increases and resistance remains constant what must happen to voltage? A) Voltage must decrease. B) Voltage must inc
trapecia [35]

Answer:

B

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5 0
3 years ago
Read 2 more answers
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