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konstantin123 [22]
3 years ago
10

Suppose the producers in a certain ecosystem are dying out because there is a lack of nutrients in the water and soil. What is t

he probable cause of the problem?
Biology
1 answer:
Alexus [3.1K]3 years ago
3 0

Answer:

D. Decomposers are not recycling nutrients for use.

Explanation:

A. There are too many carnivores in the ecosystem.

B. The herbivore population is decreasing.

C. The consumers are absorbing all of the available nutrients.

D. Decomposers are not recycling nutrients for use.

Decomposers in an ecosystem function by decomposing dead organic matters and recycling their nutrients back into the ecosystem This nutrients then become available for other group of organisms (like the producers) to pick up an utilized for their functions.

<em>Option A and B have no significant implication on the amount of nutrient in the ecosystem. Option C is also wrong because consumers only take their nutrient by feeding on producers or other consumers.</em>

The correct option is D.

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Homologous pairs of chromosomes are lined up independently of other such pairs during _____. Homologous pairs of chromosomes are
kvv77 [185]

Answer:

Homologous pairs of chromosomes are lined up independently of other such pairs during <u>metaphase I.</u>

Explanation:

Meiosis is a special type of nuclear division that occurs only in organisms with sexual reproduction. The meyotic division gives rise to gametes.

The division begins just after the chromosome DNA has replicated in the S phase. Each chromosome is made up of two identical sister chromatids joined by their centromere. However, chromosomes are not kept separate in the nucleus, but instead bind to their homologous partners. This union called synapse, occurs during prophase I.

In metaphase I, the pairs of chromosomes are aligned in the spindle Ecuador, that is, during this stage, the homologous pairs are aligned in the metaphase plate (which is the equatorial plane of the achromatic spindle) for separation.

During anaphase I, the members are directed to the opposite poles of the cell. Telophase I, this phase begins with the arrival of chromosomes at the poles and with the formation of a nuclear envelope around each group of chromosomes. During Profase II, the nuclear membrane (if formed during Telophase I) dissolves, and spindle fibers appear.

The first meyotic metaphase and anaphase is usually completed in a short time to give rise to the phases of the second division (metaphase II and anaphase II) , which is a mitosis during which the centromeres divide and the chromatides move towards opposite poles to become gamete chromosomes. In telophase II, cytokinesis separates cells.

6 0
3 years ago
Why do all nuclei undergo mitosis at the same time?
Anastaziya [24]
An organism has syncytial nuclei, which leads to parasynchronous or synchronous mitosis and therefore, multiple nuclei undergo the process of mitosis at the same time. This happens to the nuceli present in one cytoplasm, i.e., one cell. 
3 0
3 years ago
Assume that some members of an aquatic species of motile, photosynthetic protists evolve to become parasitic to fish. They gain
MaRussiya [10]

Answer:

The correct answer is C: l<em>oss of chloroplasts.</em>

Explanation:

The parasite would lose chloroplasts. As they absorb nutrients from the fish digest food in the gut of the animal, parasites do not need to photosynthesize any more. There are some parasites in the fishes digestive tract that conserve their motile capacity by keeping their flagellum or cilium. Some species get their membranes thicker for protection in their interaction with the host, and they can also secrete a special capsule.  In general, these organisms reproduce asexually.

5 0
3 years ago
Several species of leopard frogs are common throughout North America, where their ranges overlap. Different species of leopard f
MrMuchimi

the correct answer is A- Reproductive isolation occurred through behavioral isolation

A process of formation of a new species from an existing species is called speciation. New species may formed due to geographical or reproductive barriers which isolates the members of a population of a species to form a new species.

In the given question, speciation in In the leopard frogs occurred due to a particular or specific call given by males to the females. The courtship call lead to reproductive isolation due to change in behavior. Such type of behavioral change will help in recognizing mates of the same species and this will act as a reproductive barrier among the other related species.


4 0
3 years ago
Which best defines homeostasis?
zmey [24]
Im 98% sure its the 3rd one... the other 2% im not that sure
6 0
3 years ago
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