Living things use food they eat to get_____

A portion of the periodic table is shown below:

DanielleElmas [232]

Answer:

C. Phosphorus (P)

Explanation:

Given;

Electron configuration $1s^22s^22p^63s^23p^3$

Firstly we have to find out the number of shell of given element. For this we have to add number of electron of each shell.

Here counting goes to 3 that means element have three shells. Now we find out number of electrons in each shell.

First shell of an element is K and it has only one sub shell that is 1s. In this element 1s contains only 2 electrons.

For 2nd shell that is L has two sub shell 2s and 2p, for this element 2s contains 2 electrons and 2p contains 6 electrons. That means total number of electrons for L shell is 8.

Now for 3rd shell that is M has two sub shell 3s and 3p, for this element 3s contains 2 electrons and 3p contains 3 electrons. That means total number of electrons for M shell is 5.

Now total number of electrons for the element is the sum of number of electrons in each shell.

Total number of electrons = 2+8+5=15

And we know the number of electrons of any neutral element is equal to the number of protons and number of protons gives us atomic number of the element.

So the atomic number of given element is 15 that is of Phosphorus.

6 0

3 years ago

Which of the following is a general function for a fibrous protein?A) transport B) protein management C) body defense D) catalys

kupik [55]

Answer: The correct answer is- E) structural framework.

Fibrous proteins are water insoluble, elongated filamentous like structures that that provide structural framework ( they have special types of helices in their structures) to the cells or tissues of organisms.

They contain repetitive amino acid sequences in their structure that provides strength to the structure.

They are very less sensitive to any change in pH, temperature, as well as enzymatic digestion.

They are usually involved in the formation of connective tissue.

Example of fibrous protein- Actin, myosin, elastin, keratin.

7 0

4 years ago

A pea plant purebred to produce round yellow peas is crossed with a plant purebred to produce wrinkled green peas. Round pea sha

krok68 [10]

Answer:

1 out of 16 or 1/16

Explanation:

Let:

R = Round seed r = wrinkled seed

Y = Yellow seed y = green seed

Starting from the parent generation or the P generation, the genotype of the parents would be:

RRYY x rryy

This is because the cross is between a parents that are "purebred" for specific traits. This means that the parents are homozygous for the traits which in genotype form is represented by either two capital letters or two lower case letters.

Attached is the F1 generation results between a cross between the P generation.

As you can see the genotype of all the offsprings is RrYy.

Now also below is the cross between the F1 generation offsprings.

For recessive traits, it is only expressed when the dominant gene is not in the genotype, or in other words, the genotype is all in small letters. Since we are looking at two traits, you need to look for how many squares out of the total have all lowercase letters.

There is only 1 rryy out of the 16 predictions. So the answer would be 1/16.