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Vladimir79 [104]
3 years ago
12

ur data for diffusion of water across a differentially permeable membrane in response to a sucrose gradient could be graphed wit

h Change in Weight on the vertical axis rather than Total Weight. How would you interpret the slope of the curves produced when you do this?
Biology
1 answer:
musickatia [10]3 years ago
6 0
The slopes show that sucrose gradient affects change in weight.

The slopes will be different because higher gradient concentration of sucrose will result in the higher amount of water moved. This means the higher sucrose gradient concentration, the more change in weight of the water. 
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3. How can cancer cells be described?
Ad libitum [116K]

Answer:

im pretty sure

answer is c

Explanation:

6 0
3 years ago
Read 2 more answers
What variable is changed when a scientific experiment is carried out?
seraphim [82]
The dependent variable alters 
4 0
3 years ago
The students concluded that pea plants grew better in compost than did melon plants. Which of the following best addresses the v
musickatia [10]

Answer:

c. The conclusion is invalid because other variables in the experiment affected the results.

Explanation:

Consider the complete problem:

A group of students designed an experiment to determine the effect of compost on the germination and growth of plants.

The students set up experimental plots by mixing different ratios of soil and compost. They planted 20 pea and 20 melon

seeds in each plot and watered each plot regularly. The students recorded the number of seeds that germinated, and as the

plants grew they recorded the plant length, number and size of leaves, and general health observations.

The following observations were recorded.

 In all treatments, more pea seeds germinated than melon seeds

 There was a week of rainy weather at 3 weeks

 Melon plants developed a fungal growth at four weeks

 Melon plants grew longer than pea plants, but many melon leaves showed signs of yellowing as the weeks passed

The students concluded that pea plants grew better in compost than did melon plants. Which of the following best

addresses the validity of the conclusion made by the students?

a. The conclusion is valid because the independent and dependent variables in the experiment were controlled.

b. The conclusion is valid because the experimental design included a large sample size.

c. The conclusion is invalid because other variables in the experiment affected the results.

d. The conclusion is invalid because the units of measurement were not given in the experimental design.

<em>In order for the conclusion to be valid, all the independent variables should have been controlled. In this case, the independent variables such as the amount of water received by the plants, nutrient requirement of the plants, etc. were not controlled leading to fungal attack on the melon plant.</em>

<em>Hence, the conclusion is invalid because other variables that ought to have been controlled affected the experimental outcome.</em>

<em>The correct option is c.</em>

4 0
3 years ago
A population of 1,000 healthy, at risk people is monitored for one year starting on January 1st, and the development of cases of
masha68 [24]

Answer:

\mathbf{cummulative \ incidence = \dfrac{60}{1000}}

Explanation:

We recognize that total occurrence equals new cases of disease over time divided by the number of people at risk at the onset.

Mathematically:

\mathbf{cummulative \ incidence = \dfrac{New \ cases \ of \ disease \ occurrence}{Number  \ of \ population \ at \ risk \ at \ onset}}

Given that:

Number of the population at risk = 1000 individuals

New cases during Jan 1 - Dec 31 = 60 because;

At 20 occurred on June 30 & 40 on Sept. 30) & no new cases were identified after that:

∴

\mathbf{cummulative \ incidence = \dfrac{60}{1000}}

3 0
2 years ago
Someone answer these 2 for me
Sophie [7]

Answer:

F=dominant, 6 fingers

f= reccessive, 5 fingers

Ff= 6 fingers( contains dominant gene)

if you combine Ff and Ff you get:

25% FF (6 fingers)

50% Ff (6 fingers)

25% ff ((5 fingers)

so only 25% will have 5 fingers (normal)

Answer2:

Dominant=normal hearing

Recessive= deafness

If one parent is RR and the other Rr, the offspring will be:

50% RR

50% Rr

so all the offspring will have normal hearing, and there is 0% of deafness.

Hope it helps!!

6 0
3 years ago
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