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diamong [38]
2 years ago
5

A student is investigating the affect of different salts on melting points. Four patches of ice of equal size are roped off and

a different
type of salt is poured on each one receives table salt (NaCl), one receives Calcium Chloride (CaCl2), one receives Potassium
Carbonate (KCO3) and the fourth receives Inert sand instead. Each patch receives an equal amount of salt or sand. The student
measures the volume of ice remaining and subtracts it from the original volume of ice to see how much melted away. What is the
dependent variable?
•
A. The type of salt applied to the ice.
B. The amount of lee that melted.
C. The ice that received sand.
D. The size of the Ice patches
Biology
1 answer:
d1i1m1o1n [39]2 years ago
4 0

Answer:

B. The amount of lee that melted.

Explanation:

The dependent variable is more of what results from an action during an experiment. It is actually what is being tested for. In the experiment, the scientist seeks to understand the effect of salts on melting point of ice. He selects the different salts which can cause a ice to melt (independent variables) then he sets up to find out the effect of the salt on the ice.

He cannot control how much ice will melt. The properties of the salts would determine the extent and rate of the dissolution of the ice pack. This is the dependent variable which relies on the nature of the salt.

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W why do immune system cells contain large amounts of lysosomes
vovikov84 [41]
Some of those lysosomes contain secretions that will help the immune cells destroy foreign pathogens. 
Hope that helped you.
5 0
2 years ago
Read 2 more answers
Classify the events as autogenic or allogenic succession.
nydimaria [60]

In ecology, allogenic succession is mediated by the abiotic components of the ecosystem, while the autogenic succession refers to the succession, which is mediated by the biotic components of an ecosystem.  

A volcanic eruption wiping out an entire island is an example of allogenic succession.  

A soybean crop helping in nitrogen fixation, leading to the development of other species is an illustration of autogenic succession.  

A tsunami devastating all the living organism in a habitat is an example of allogenic succession.  

Oak trees preventing the growth of smaller sun-seeking shrubs is an example of autogenic succession.  


5 0
2 years ago
Two unlabeled slides are viewed under a microscope. Slide A has cells with a visible nucleus, mitochondria, a cell membrane, a c
Travka [436]

Answer:

C. Slide A, plant cells; Slide B, animal cells

Explanation:

The slide A has some organelles that are unique to plant cells, and are mostly found in plant cells. Organelles such as a cell wall and chloroplasts are unique features of plant cells. They are normally absent in animal cells.

Therefore, slide A, which has these cell organelles can be rightly labelled as "plant cells", while side B, which has these organelles missing, can be labelled as "animal cells".

3 0
2 years ago
Look at the data related to honey bee population losses between 2006 and 2013 (Figure 1). Expand on the data. How would you revi
olga_2 [115]

In order to improve the graph and make it more detailed in order to get a better perception why the honey bee populations are decreasing, there's few things that can be added.

- Number of bee keepers over the period

The number of the honey bee colonies is directly connected as to how many bee keepers there are. If there's a trend of a decline in the bee keepers, than there will be a trend in the decline of the honey bees.

- Area of trees suitable for the honey bees

The trees are crucial for the honey bees to be able to produce honey, thus it is very important that they have a certain area of trees on which they can feed upon. If there's a decline in the number of trees for the bees, than the bees will be dying from starvation.

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The honey bees are animals that are very sensitive to changes in the environment, especially when it comes to pollution. If the levels of pollution are increasing in areas where there's honey bees, it will certainly affect their numbers in a negative manner.


4 0
2 years ago
Read 2 more answers
Cinnabar colored eyes (cn) and reduced bristles (rd) are autosomal recessive genes and lobe shaped eyes (L) is an autosomal domi
Morgarella [4.7K]

Answer:

The correct genotypic notation for a wild type with phenotypic characteristics: red eyes, long bristle and round eyes will be any of CNRDll, CnRdl, CnRDl or CNRdl if c, n, r and d are capable of independent assortment and CNRDl if they cannot.

Explanation:

The eye color and bristle size is coordinated by either recessive cn and dominant CN or Cn genes. The wild type in questions has red color eyes, which is a dominant trait coordinated by CN or Cn if c and n can undergo assortment independently or just CN if they cannot. The second characteristics of the wild type is long bristle. We were told that reduced bristle is coordinated by recessive rd Gene. Then the long bristle in our specimen wild type will have dominant genotypic notification of RD or Rd, depending if r and d can undergo assortment independently. The last trait is a round eyes, which is a recessive trait controlled by recessive allele l. Therefore, the combined characteristics of red eye color, long bristle and round eyes shape of the wild type will be CNRDl or any of CNRDll, CnRdl, CnRDl CNRdl depending on the segregation pattern of c, n, r and d.

3 0
2 years ago
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