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Masja [62]
3 years ago
15

What is a derived trait?

Biology
1 answer:
Agata [3.3K]3 years ago
8 0

Answer:

A.

Explanation:

Because the trait undergoes a secondary loss; it has been there but it doesn't always appear in all generations.

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Cytokinesis often, but not always, accompanies _____.
Maksim231197 [3]
Cytokinesis often, but not always, accompanies Telophase.

Happy Studying! ^=^

4 0
4 years ago
A sonar pulse has a wavelength of 3.2 cm and a speed of 1,500 m/s in water. What is the frequency of the pulse? (
Gelneren [198K]

Explanation:

The universal wave equation states that the velocity of a wave is the product of its wavelength and its frequency.

Mathematically speaking,

∣

∣

∣

∣

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

a

a

v

=

λ

f

a

a

∣

∣

−−−−−−−−−−−

where

−−−−−

:

v

=

velocity of wave (metres per second)

λ

=

wavelength (metres)

f

=

frequency (hertz or reciprocal seconds)

Step 1

Convert the given wavelength from centimetres into metres.

3.0

i

c

m

×

m

100

i

c

m

=

3.0

c

m

×

m

100

c

m

=

0.030

i

m

Step 2

Rearrange for frequency,

f

, in the universal wave equation.

v

=

λ

f

Becomes,

f

=

v

λ

Step 3

Substitute your known values to solve for the frequency of the pulse.

f

=

1500

i

m

s

0.030

i

m

f

=

50000

i

H

z

Rounding off the value to two significant figures,

f

=

∣

∣

∣

∣

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

a

a

5.0

×

10

4

i

H

z

a

a

∣

∣

−−−−−−−−−−−−−−−−

5 0
3 years ago
The reason that the mail bed appears pink is the presence of a larger number of melanocytes in the underlying dermis
Ilia_Sergeevich [38]

Complete question:

True or False: The reason that the nail bed appears pink is the presence of a larger number of melanocytes in the underlying dermis.

Answer:

False

Explanation:

Nails are composed of the lamina, which is a smooth, shiny, translucent, and keratinized structure. The nails are born the nail matrix. The newly formed nail slice along the mail bed, which is the plane surface under the nails.  

The nail bed places under the nail and is composed of a thin epithelium, with no granulous stratum, and a few layers of parakeratotic cells attached to the nail.  

The nail matrix and nail bed have melanocytes. Half of the melanocytes of the matrix produce melanin, while melanocytes of the nail bed are inactive.  

The nail bed is laying over many small vessels that nourish it and provides a pink color to the nails.

6 0
3 years ago
What is the function of the mitotic spindle and spindle fibers during mitosis?
Julli [10]
Spindle fibers<span> form a protein structure that divides the genetic material in a cell. The </span>spindle<span> is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both </span>mitosis<span> and meiosis. Spindle fibers are called mitotic spindle during mitosis.</span>
7 0
3 years ago
Read 2 more answers
Question 23
blondinia [14]
D. Sensory ( afferent) division
8 0
3 years ago
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