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aliina [53]
2 years ago
8

Why must cells divide to stay small or change shape to reduce volume?

Biology
2 answers:
stepan [7]2 years ago
4 0

Answer:

if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume. When this happens, the cell must divide into smaller cells with favorable surface area/volume ratios, or cease to function. That is why cells are so small.

Explanation:

Ahat [919]2 years ago
3 0

Answer:

To ensure the cell is able to obtain nutrients or remove wastes.

The important point is that the surface area to the volume ratio gets smaller as the cell gets larger. Thus, if the cell grows beyond a certain limit, not enough material will be able to cross the membrane fast enough to accommodate the increased cellular volume That is why cells are so small.

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Unlike record players which rotate at a constant angular velocity, the CD-ROM driver in a CD player rotates the CD at different
zimovet [89]

Answer:

A. 21 rad/s

B. 200.5 rpm

C. 26.46 rad/s2

D. 0.299 Hz

Explanation:

Parameters given are:

Tangential velocity,v = 1.26m/s

Diameter (outer edge) = 0.120m

Outer edge radius, ro = 0.12/2

= 0.06m

A. Calculate Angular velocity

Angular velocity, w = v/r

= v/ro

= 1.26/0.06 = 21 rad/s

In rpm,

2pi/60 rad/s = 1 rpm

1 rad/s = 60/2pi rpm

Sp, 21 rad/s = 60 * 21/2pi rpm

= 200.5 rpm

B. Calculate the inner edge radius, ri given w = 500 rpm

Converting rpm to rad/s,

= 2pi/60 * 500 rad/s

= 52.34 rad/s

ri = v/w

= 1.26/ 52.36

= 0.024m

C. Calculating centripetal acceleration, a from the outer edge, ro

a = v2/r = w2r

= (1.26)2/0.06

= 26.46 rad/s

D. Calculate the frequency, f of the outer edge angular velocity, w = 21 rad/s

f = 2pi/w

= 2pi/21

= 0.299 Hz (or per second)

5 0
3 years ago
Which is administered to the general population through table salt? <br>​
Dmitry [639]
Table salt contains iodine in it now.
5 0
3 years ago
What are the benefits to selective breeding?
kykrilka [37]

Benefits of selective breeding:

<em>Variation</em>

<em>Longer </em><em>life </em><em>span </em><em>for </em><em>bred </em><em>animals</em>

<em>Less </em><em>harm </em><em>to </em><em>surrounding</em><em> </em><em>organisms</em><em> </em><em>(</em><em>for </em><em>example</em><em>,</em><em> </em><em>humans)</em>

<em>More </em><em>food </em><em>(</em><em>plant </em><em>breeding)</em>

<em>Faster </em><em>growth </em><em>(</em><em>plant </em><em>breeding)</em>

3 0
3 years ago
Read 2 more answers
A true-breeding plant with inflated pods and yellow pods is crossed with a plant that has constricted and yellow pods. Draw a
xenn [34]

Answer:    Sysy ×  Sysy  i.e. <em>all are genotypically heterozygous, inflated, and yellow</em>

Explanation:

Punnett squares are a diagrammatic means of determining traits of hybrid offspring produced via crosses in genetic breeding. The parental genotypes and phenotypes are usually known, and these typically follow standard Mendelian ratios and inheritance.

Mendelian genetics focus on trait inheritance, or heritability. These traits are packaged out into its own gamete, inherited by themselves and often show dominance, where one's effect may mask those of another trait.

These are called the Law of Segregation, Independent assortment and Dominance respectively.

For this cross...

Parent generation or P generation:

gametes: Y → pod color green dominant (Y), yellow recessive (y)

                S→ pod size; inflated dominant (S), constricted recessive (c)

Assumptions...

  • True breeding plants are homozygous, with identical sets of alleles
  • The other parent is heterozygous, as it was not said to breed true

P generation:                          SySy  × sysy

<em>                             yellow,  inflated    </em>× <em> yellow,  constricted</em>

<em></em>

F1 generation:                           Sysy ×  Sysy              ...(from punnet square)

<em>phenotype</em><em>:        yellow,  inflated    </em>× <em> yellow,  inflated </em>

<em></em>

<em>∴ all are genotypically heterozygous, inflated, and yellow</em>

7 0
3 years ago
Amoeba Sisters Video Questions
34kurt

Answer:

true

Explanation:

3 0
3 years ago
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