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pantera1 [17]
3 years ago
12

How many valence electrons do elements in group 14 have

Biology
1 answer:
Alex Ar [27]3 years ago
6 0

Answer: 4

Explanation: There are 4 valence electrons in group 14, the Carbon group.

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Juan, a graduate student in an electrophysiology lab, stimulates an isolated neuron grown in a petri dish and measures its actio
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<u>Answer</u>: d. it will release chemical messengers.

The action potential, which is an electric pulse, will travel down the axon untill it reaches the synapses. At the synapses, neurotransmitters (chemical messengers) will be released by the neuron.

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3 years ago
What tissue makes up most of the wood of a tree? A. primary xylem B. secondary xylem C. secondary phloem D. vascular cambium
Over [174]

<u>B. Secondary xylem</u> tissue makes up most of the wood of a tree.

<h3><u>What exactly is secondary xylem?</u></h3>

Secondary xylem is a sort of xylem produced by secondary growth. During initial growth, in contrast, the primary xylem develops. As a result, the secondary xylem is linked to the primary xylem by lateral growth as opposed to the vertical extension.

The kind of cambium that gives rise to each difference is another point of differentiation. The vascular cambium produces the secondary xylem, while the procambium produces the primary xylem.

Unlike trees and shrubs, non-woody plants lack secondary xylem. It gives such plants mechanical support by depositing lignin into their cell walls, thickening them. Compared to the major xylem, the secondary xylem is made up of tracheids and veins that are shorter and wider. In comparison to the primary xylem, it is also richer in xylem fibers.

Possible growth rings in the secondary xylem (or annual rings). Sapwood and heartwood are two differentiators of the secondary xylem in big woody plants.

Learn more about secondary xylem with the help of the given link:

brainly.com/question/703995

#SPJ4

4 0
1 year ago
Since viruses are typically 20-200 nm in diameter, the ____ microscope is best for viewing them.
tatyana61 [14]

Electron is the best way for viewing them

3 0
3 years ago
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The CJ bacteria in the chickens at Monita Farms have a high frequency of the allele that causes FQ resistance. If genetic drift
vova2212 [387]

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Yes

Explanation:

If the farm CJ bacteria were created by bacteria from another farm, then you would find the allele on both farms.

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2 years ago
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Who developed the system known as anthropometry?
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Alphonse Bertillon was a French criminologist who first developed this anthropometric system of physical measurements of body parts.
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