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dolphi86 [110]
2 years ago
8

Which best describes a centromere?

Biology
1 answer:
faust18 [17]2 years ago
3 0

c is the best answer home this helps

if it did mark me brainlyist

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students are measuring the rate of enzyme activity. the graph below shows the rate of enzyme action as they increase the tempera
kykrilka [37]

Answer:

The heat will cause the enzyme to denature(deform) and the subtrate will no longer fit into the enzyme.

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3 years ago
A hockey player slides a puck over the surface of the ice the ice exerts a ________ force on the puck
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Friction force i think but not 100%
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3 years ago
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Ophrys sphegodes, the early spider orchid, has flowers with yellow-green sepals and petals and one highly modified, velvety brow
oksano4ka [1.4K]

Answer and Explanation:

a. This is a complete flower. Complete flowers are those formed by chalice, corolla, androecium and gynoecium. In the case of the flower presented above, we can see that it has gynoecium because it has a stigma that is part of the gynoecium composition. We can also see that she has androecium, because she has an anther that is part of the composition of androecium. The flower also has a corolla and chalice, since the chalice is formed by the sepals and the corolla by the petals.

b. This is a perfect flower, as we can see that androecium and gynoecium are present in the same flower. Imperfect flowers are those with only androecium or gynoecium.

c. The flower has bilateral symmetry, which is common in all orchids. This type of symmetry allows the flower to only be divided into two equal parts. Radial symmetry, on the other hand, allows flowers to be divided into many equal parts.

7 0
2 years ago
Plzz helpppp!!!!! Will give brainliest and 10 pts!!!!
Alik [6]

Explanation:

Red-shift

Emission spectra

Light from a star does not contain all the wavelengths of the electromagnetic spectrum. Elements in the star absorb some of the emitted wavelengths, so dark lines are present when the spectrum is analysed. Different elements produce different patterns of dark lines. The diagram shows part of the emission spectrum of light from the Sun.

A gradient colour spectrum of the sun.

Spectra from distant galaxies

Astronomers can observe light from distant galaxies. When they do this, they see it is different to the light from the Sun. The dark lines in the spectra from distant galaxies show an increase in wavelength. The lines are moved or shifted towards the red end of the spectrum. This effect is called red-shift. The diagram shows part of the emission spectrum of light from a distant galaxy.

A gradient colour spectrum of a distant star.

Red-shift and speed

Astronomers see red-shift in virtually all galaxies. It is a result of the space between the Earth and the galaxies expanding. This expansion stretches out the light waves during their journey to us, shifting them towards the red end of the spectrum. The more red-shifted the light from a galaxy is, the faster the galaxy is moving away from Earth

3 0
2 years ago
The levels of hCG are highest during the. Trinester<br><br>A first<br>B second<br>C third ​
SVETLANKA909090 [29]

Answer:

first because that the first

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