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2 years ago

Animal cells do NOT have cell walls. Why do you think this is an advantage?

2 answers:

7 0

Animal cells do not have cell walls because they do not need them. Cell walls, which are found in plant cells, maintain cell shape, almost as if each cell has its own exoskeleton. This rigidity allows plants to stand upright without the need for bones .

andriy [413]2 years ago

6 0

Answer:

Because they don't need them , cell wall which are found in cell, maintain cell shape almost as if each cell has it's own exoskeleton ame this them to stand upright without the need for bones .

Explanation:

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Help me on question 5 pls

Gre4nikov [31]

Ca +2
At -1
In +3
Sr +2
Ra +2
Fr +1
Ba +2
As -3

7 0

2 years ago

Uranium has atomic number 92. Its most common isotope is 238U, but the form used in nuclear bombs and nuclear power plants is 23

Yakvenalex [24]

Explanation:

Atomic Number = Number of protons

Mass Number = Number of protons + Number of neutrons

Isotopes are simply atoms of an element with the same number of protons and different number of neutrons.

First Isotope -- 238U

Number of neutrons = Mass Number - Atomic Number

Number of neutrons = 238 - 92 = 146

Second Isotope -- 235U

Number of neutrons = Mass Number - Atomic Number

Number of neutrons = 235 - 92 = 143

3 0

2 years ago

Select the compound with the lowest lattice energy.

tatyana61 [14]

Answer:

A. CsBr(s)

Explanation:

we will get here compound with the lowest lattice energy

solution

As we know that Lattice energy is always proportional to the charge of ions and it is inversely proportional to the size of ions.

so that by the smallest charge and the largest size give us the lowest lattice energy and that charge and size is express as here as

Charge

Cs (+1), K(+1), Na (+1), Cl(-1), Br(-1), Sr(+2), Ca(+2), O(-2) .......................1

and

Size

Na+ < Ca2+ < K+ < Sr2+ < Cs+, O2- < Cl- < Br- ..........................2

so that here

correct answer is A. CsBr

6 0

2 years ago

Please help ill mark branliest (im using the last of my points for this so please don't scam me)

vichka [17]

Answer:

ok :)

Explanation: genetically modified organisms (GMOs) are being made by inserting a gene from an external source such as viruses, bacteria, animals or plants (etc) into foods. Genetically modified foods seem to be not as healthy as unmodified foods, according to research. also many people are against it due to the fact that some people go overboard and add too many genetically modified organisms, which causes health risks and unfortunately harms people. sometimes genetically modified food contains toxins and antibiotics. srry i couldnt find much on the process but this is based off my background knowledge so yeah

8 0

1 year ago

Express each of the following in standard form.

swat32

Answer:3.6 x 101 or 8.77 x 10-1

3 0

2 years ago