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timofeeve [1]
2 years ago
5

Which of the following abnormalities demonstrates a cranial defect? Select one: a. Encephalocele b. Cystic hygroma c. Holoprosen

cephaly d. Agenesis of the corpus callosum
Biology
1 answer:
Ivanshal [37]2 years ago
8 0

Answer:

The correct answer is encephalocele.

Explanation:

The cystic hygroma is a malformation in the neck or upper abdominal area and holoprosencephaly is a malformation or alteration in the facial area, not in the cranial area.

The only one where the shape of the skull is altered (mainly the area of the calotte) is the encephalocele.

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Bruce Wallace (1963) established a laboratory population in which the recessive allele lt was at a frequency of 0.5. He propagat
Alenkinab [10]

Answer:

a. True

Explanation:

Bruce Wallace was a professor emeritus of genetics who performed many population studies. He worked in 1958 at the University of Cornell as a professor of genetics. In 1963, he performed a population study wherein the recessive allele <em>It </em>was at a frequency of 0.5. The population was propagated for 10 generations and the frequency of <em>It</em> for each generation was determined.

The result of this study showed that<em> lt/lt </em>died without reproducing, whereas, individuals with genotype <em>+/+ </em>were normal.

8 0
3 years ago
What happens to the carbon dioxide produced by cellular respiration? A. It is reused by the body as glucose. B. It is excreted f
AfilCa [17]
B it breath out i hope it helps                 
3 0
3 years ago
Northern flickers are woodpeckers of the eastern United States. Males, but not females, have black feathers that resemble a mous
jek_recluse [69]

Answer:

This suggests that the moustache is a releaser for aggression.

Explanation:

<em>Fixed action patterns</em> are instinctive programmed responses in different species that are triggered by a specific external sensory stimulus. These stimuli are called sign stimuli or releaser. When the sign occurs, the animal starts a sequence of acts in response to the stimulus and continuous until the series of actions is completed.

The black feathers resembling a mustache in a <em>Northern flickers</em> male are an external sensory stimulus. This trait that can provoke another male to respond aggressively, as a f<em>ixed action pattern</em>.  

This trait might be considered as an <em>unconditioned stimulus</em>, which <em>provokes an unlearned or reflex reaction</em>. These aggressive responses are triggered by reflex.

7 0
3 years ago
Each cell has a structure that separates the inside of the cell from.the environment. What cell is this?
kotykmax [81]

Answer:

Either the cell wall or the cell membrane.

Explanation:

All cells have cell membranes which line the outside of the cell, and some cells have cell walls, which also line the outside of the cell. Since all cells have cell membranes I am inclined to believe that the correct answer would be cell membranes.

8 0
3 years ago
How would planting a variety of plants in a vacant lot help establish an ecosystem in that location?
hjlf
Trees would help make a forest. Tall grass would help make a meadow. Hope this helps!
6 0
3 years ago
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