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romanna [79]
3 years ago
9

Once an egg has been fertilized: multiple choice

Biology
2 answers:
Taya2010 [7]3 years ago
5 0

a mature egg is fertilized when it is joined with a sperm cell

the answer is B

Papessa [141]3 years ago
5 0
The answer is A: A zygote is formed
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How does gene expression lead to differentiation
ExtremeBDS [4]
Every cell of the organism has the same DNA sequence and same genes. However, not all genes are expressed in every single cell at the same time. Only those genes necessary for a specialised function of a specialised cell are expressed in the specialised cell. For example, skin cells have some different proteins than nerve cells. Genes responsible for those "skin proteins" are activated in skin cells and are turned off in nerve cells.
3 0
3 years ago
A performer, seated on a trapeze, is swinging back and forth with a period of 8.90 s. If she stands up, thus raising the center
iren2701 [21]

Answer:

8.800s

Explanation:

When the performer swings, she oscillates in SHM about Lo of the string with time period To = 8.90s.

First, determine the original length Lo, where for a SHM the time period is related to length and the gravitational acceleration by the equation

T = 2π×√(Lo/g)..... (1)

Let's make Lo the subject of the formulae

Lo = gTo^2/4π^2 ..... (2)

Let's put our values into equation (2) to get Lo

Lo = gTo^2/4π^2

= (9.8m/s^2)(8.90s)^2

------------------------------

4π^2

= 19.663m

Second instant, when she rise by 44.0cm, so the length Lo will be reduced by 44.0cm and the final length will be

L = Lo - (0.44m)

= 19.663m - 0.44m

= 19.223m

Now let use the value of L into equation (1) to get the period T after raising

T = 2π×√(L/g)

= 2π×√(19.223m/9.8m/s^2)

= 8.800s

7 0
3 years ago
What is an index fossil?
galina1969 [7]

Answer:

a fossil that is useful for dating and correlating the strata in which it is found.

Explanation:

Maybe D I hope it helps you

5 0
3 years ago
The thick fluid inside this organelle is where many of the reactions of photosynthesis take place. this fluid is called the
Law Incorporation [45]
Your answer would be Stroma 

hope this helps [:
6 0
3 years ago
Which of the following is NOT true of carbon?
valkas [14]

Answer:

it is b

Explanation:

6 0
3 years ago
Read 2 more answers
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