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zepelin [54]
2 years ago
8

In the angiosperm life cycle, two sperm cells are discharged in each ovule. The reason that two sperm nuclei travel down the pol

len tube is that___.
Biology
1 answer:
blondinia [14]2 years ago
5 0

Answer:

One fertilizes the egg, and the other combines with the two polar nuclei.

Explanation:

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An amino acid is synthesized by the prokaryote, E. coli. The genes for the enzymes are responsible for synthesizing this amino a
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The answer is when levels of the amino acid are high, it binds to the repressor, ending the synthesis of this amino acid

6 0
3 years ago
1 Populations that show uniform dispersion typically show the following characteristics EXCEPT:
professor190 [17]

1. Answer: C

Explanation: Species that are inclined to clumping means they are more likely to cooperate in tasking such as gathering food. However, evenly distributed population means there is competition between individuals hence the need to their own space and territory from the other individual.

2. Answer: B

Explanation: While the clumped up populations may be inclined to cooperate in tasks such as food gathering, such distribution results to increases intraspecies competition especially during scarcity. This is because the individuals are close together – which is also advantageous during mating season.

3. Answer: A

Explanation: Type 3 survivorship curve is characterized by a high mortality rate early in the life of the species which gradually progresses to a low mortality rate for the individuals that survive the early stages of life. These species, therefore, bear a lot of offspring most of which will not make to adulthood.

4. Answer: B

Explanation: If the death rate of a population is higher than the birth+ immigration rate, then the population must be decreasing. This can be demonstrated by a growth curve of a population such as that of bacteria. The population starts decreasing due to increased competition for reduced resources after reaching carrying capacity  - depicted by the stationary phase.

4 0
3 years ago
Describe a continental rise
Alik [6]

Answer: Continental rise is an underwater sediment feature found between the continental slope and the abyssal plain. This feature can be found all over the world and represents the final stage at the boundary between the continents and the deepest part of the ocean.

Explanation:

El ascenso continental es una característica de sedimento submarino que se encuentra entre el talud continental y la llanura abisal. Esta característica se puede encontrar en todo el mundo y representa la etapa final en el límite entre los continentes y la parte más profunda del océano.

4 0
3 years ago
Sand dunes protect beaches against erosion and
sineoko [7]

Answer: building houses near the beach

Explanation:

I just took it

6 0
3 years ago
Read 2 more answers
Which are characteristics of natural selection?
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Answer:

-There is a variation in traits.

-The environment cannot support unlimited populations of organisms.

there is heredity.

-The trait that allows the organism to have more offspring will become more common in the population of organisms.

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3 years ago
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