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svet-max [94.6K]
3 years ago
11

Which picture below shows an atom with 4 valence electrons?

Biology
1 answer:
Nikolay [14]3 years ago
3 0

Answer:

Be

Explanation:

its B bc theres 4 elections

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If I mix red, blue, and green light equally I get white light. Would the same thing happen if I mix the same colors in paint? Wh
BaLLatris [955]
No, it will not make white. Mixing light is different from mixing pigments. Paint is a pigment not light.
(Hope this helps!)
6 0
3 years ago
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You observe a plant on your windowsill that is growing at an angle toward the outside. This is an example of a living thing ____
katrin2010 [14]

Answer:

response to stimuli / tropism

Explanation:

The plants and animals always respond to stimuli. It is an innate character of all living things. When a bright light falls on the eye, it closes immediately. This is responding to the stimuli. When someone touches the leaves of touch-me-not plants it closes its leaves due to the external stimuli.

The plants respond to the light. Because it does photosynthesis in the presence of light. Therefore, the leaves and branches of the plants always bend towards the light. This process is called phototropism.

Similarly, the roots of the plants move towards gravity under the ground. This is called geotropism.

Besides phototropism and geotropism, other types of stimuli are there - hydrotropism(response to the water), chemotropism(response to certain chemicals).

That's why the plants growing on the windowsill move towards outside where light comes.

7 0
3 years ago
Why do scientists monitor the effect of each method
Fiesta28 [93]
The answer is B since climate change is already a huge issue in today’s society
4 0
3 years ago
What percentage of earths history has included present day humans?
HACTEHA [7]
The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period.
8 0
4 years ago
Thermoreceptors detect body temperature and send impulses to the brain for analysis. If body temperature is low, the brain will
LenKa [72]

Answer:

A. Skeletal muscles

Explanation:

An effector is a group of cells, an organ, gland or any part of the body that acts to bring about a change in response to a nerve impulse from the CNS.  

In the case of thermogenesis as stated in the question above, where a drop in temperature is detected by thermoreceptors in the CNS, the part of the body that responds in returning the body temperature back to its baseline are the skeletal muscles. The skeletal muscles are the effectors that responded in repeated contracions to generate heat.

8 0
3 years ago
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