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AlladinOne [14]
2 years ago
11

Select the true statements concerning tracheids. tracheids are responsible for anchoring the plant to a substrate. pterophytes l

ack tracheids but have euphylls. without tracheids colonization of land would not have been possible. all of the large dominant extant land plants are tracheophytes. tracheids allow for efficient transport of water over longer distances.
Biology
1 answer:
Mazyrski [523]2 years ago
3 0

The right answer is tracheids allow for efficient transport of water over longer distances.

Tracheids are conduits for the transport of raw sap (composed of water and mineral salts) to vascular plants. They are composed of a series of elongated cells. During the formation of tracheids these cells die, are emptied of their contents and are fused vertically to form a hollow conduit. The tracheids are located in the xylem, plant tissue allowing the transport of raw sap. Derived from the primary xylem (protoxylème), they have a role in the overall support of the plant.

In addition to tracheids, angiosperms possess vessel elements for transporting raw sap.

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Black coat color in horses is conferred by the presence of a dominant B allele. Chestnut horses are genotype bb. A population of
AysviL [449]

Answer:

Frequency of B allele is 0.6681

Explanation:

If p represents the frequency of dominant allele and q represents the frequency of  recessive allele, according to Hardy-Weinberg equilibrium:

p + q = 1

p² + 2pq + q² = 1

where p² = frequency of homozygous dominant genotype

q² = frequency of homozygous recessive genotype

2pq = frequency of heterozygous genotype

Given that number of recessive chestnut horse = 28

Total horses = 226 + 28 = 254

frequency of b² genotype = 28/254 = 0.1102

frequency of recessive b allele = √0.1102 = 0.3319

So, frequency of B allele =

1 - 0.3319 = 0.6681

Hence frequency of B allele is 0.6681

7 0
2 years ago
Which microscopic organisms are smallest?
anastassius [24]

Answer:

a. bacteria

Explanation:

google said so

5 0
1 year ago
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In direct calorimetry, a person is placed in a large, water-insulated chamber. The chamber is kept at a constant temperature. Wh
Anastaziya [24]

Answer:

Although direct calorimetry is considered to be the most precise technique for the measurement of metabolic rate, construction of such a chamber that is large enough for doing exercise physiology research (or any research for that matter) is extremely expensive and not at all mobile.

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5 0
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You are operating a powerboat at night. Your red sidelight must be visible to boats approaching from which direction(s)?
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I believe the answer is head-on and port (left). The side lights are usually visible to vessels approaching from the front or the side. The red light usually indicates a vessel's port (left) side while the green light indicates a vessel's starboard (right) side. These lights ensure that there is safety at night as the vessels navigate.
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Drag each ore to the metal it produces. Answer may be used more than once.
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Answer:

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Copper: chalcopyrite

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Explanation:

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