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Ymorist [56]
3 years ago
7

In an experiment designed to test the effect of temperature on goldfish respiration, the temperatures that were changed represen

t what type of variable?
A. control
B. responding
C. experimental
D. correlative
E. placebo
Biology
1 answer:
DENIUS [597]3 years ago
4 0

Answer:

C. experimental

Explanation:

Experimental variables are the variables that are changed during the experiments to observe the effects of these changes. An experiment usually has one or more experimental variables. An experimental variable that is changed to know its impact on some other variable is called the independent variable.

In the given experiment, goldfishes were exposed to various temperature conditions to observe the effect of temperature on respiration. Therefore, both temperature and respiration rate are the experimental variables here.

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If you treated embryos with a Notch inhibitor how would this affect the specification of venous and arterial endothelial cells?
Alisiya [41]

Answer:

d. all endothelial cells would be venous

Explanation:

The Notch signaling pathway is a cell signaling system which consist basically of 4 NOTCH genes ( NOTCH1, NOTCH2, NOTCH3, and NOTCH4) each of them having the information to build a particular cell membrane receptor protein.

It has been demonstrated in zebrafish embryos that Notch signaling are highly determinant factors during vascular development, and a key function of these genes was specifically to regulate the differentiation of arterial fate in endothelial cells.

Notch signaling-deficient embryos showed a loss of expression of arterial markers such as ephrinB2 from arterial vessels with an accompanying expansion of venous markers into normally arterial domains. In contrast, embryos in which Notch signaling had been ectopically activated, meaning an activation out of "proper" place (where not expected, e.g. venous endothelial), exhibited the contrary phenotype, this is a suppression of vein-specific markers with ectopic expression of arterial markers in venous vessels.

To summarize, when Notch is supressed (in this case inhibited with a specific Notch inhibitor) arterial fate of endothelium is not followed, and venous fate is stablished. Thus, endothelial cells (those expected to form venous tissues but also arterial ones) would specified as venous.  

4 0
3 years ago
The three types of ocean floor sediments are terrigenous, biogenous, and _____.
Ber [7]

Answer:

<h3>Seafloor sediment consist mostly of terrigenous sediment, biogenous sediment and hydrogenous sediment. Terrigenous sediments form from sediments carried from the land into the ocean by water, wind or ice.</h3>
7 0
3 years ago
Read 2 more answers
Can you help me please i will give you a branlist and it’s science
creativ13 [48]
The answer is A because c doesn’t make sense if it’s vibrating wouldn’t we feel or see it?
4 0
3 years ago
Where are the organisms depicted on a cladogram?
QveST [7]

Answer:

Shows the common ancestor of all living organisms

Explanation:

They're just the lineup of organisms looking for a common ancestor and common traits or where the traits came from.

4 0
3 years ago
Cellular respiration “ adds or removes” carbon dioxide from the atmosphere
zimovet [89]

Answer:

'Adds' is the correct option

Explanation:

During cellular respiration, glucose and oxygen are changed into energy and carbon dioxide. Therefore, carbon dioxide is released into the atmosphere during the process of cellular respiration.

5 0
3 years ago
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