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lisabon 2012 [21]
3 years ago
14

What's the answer for this question?

Biology
1 answer:
Elenna [48]3 years ago
6 0

Answer:

cell wall

cell membrane

cytoplasm

nuclear membrane

Explanation:

answers according to the order ABCD

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Why is selectively permeable better than totally permeable or totally impermeable?
Vlad [161]
Because it allows only certain substances to permeate. If it was totally permeable that would be good enough to having no barrier as it would let everything though. Totally impermeable means that nothing would get through.
3 0
4 years ago
A stone is thrown upward with velocity 72 km/hr. if air resistance is neglected, find the maximum height travelled by it and the
labwork [276]

Answer:

s= 20.04m,   t=2.022s

Explanation:

4 0
3 years ago
Part A - Independent assortment of three genes A wild-type tomato plant (Plant 1) is homozygous dominant for three traits: solid
Effectus [21]
<h2>Law of independent assortment </h2>

Explanation:

  • There are 8 distinct phenotypes, each one has a 12,5% of appearance: Since M=solid leaves D=normal height P= smooth skin.
  • Recessive gene characters can only be taken in homozygous recessive mmddpp.  

      1. MmDdPp: M=solid leaves D=normal height P= smooth skin.

     2. MmDdpp M=solid leaves D=normal height pp= peach skin.

    3. MmddPp M=solid leaves dd=dwarf height P= smooth skin.  

    4. Mmddpp M=solid leaves dd=dwarf height pp= peach skin.

    5. mmDdPp mm=mottled leaves D=normal height P= smooth skin.  

    6. mmDdpp mm=mottled leaves D=normal height pp= peach skin.  

    7. mmddPp mm=mottled leaves dd=dwarf height P= smooth skin.  

   8. mmddpp mm=mottled leaves dd=dwarf height pp= peach skin.

Hence,The answer is all eight possible phenotypes from the cross MmDdPp x mmddpp are equally likely, resulting in a phenotypic ratio of 1:1:1:1:1:1:1:1

3 0
4 years ago
Tube A contains 1ml of phage stock that has been added to 9ml sterile media. Tube B contains 1ml from Tube A that has been mixed
natulia [17]

Answer:

1/1000 or 0.001

Explanation:

Serial dilution refers to the systematic dilution of the known concentration through successive suspension of initial volume to a fixed value of diluent.

In the given question, the serial dilution is performed in which the dilution factor will be

DF= volume of added solution / total volume of solution

For tube A

= 1/ 1+9

=1/10 or 10 folds.

For tube B

= 1/10 x 1/10

= 1/100 or 0.01

For Tube C

= 1/10 x 1/10 x 1/10

= 1/1000 or 0.001

Therefore, total dilution of tube C will be 0.001 or 1/1000.

6 0
3 years ago
Why would a spray defense be a useful mechanism for a species?
GalinKa [24]
If you're referring to an organism like a skunk or a squid, yes. It is useful because it can disorient a predator so the prey can get away safely.
4 0
4 years ago
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