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andrezito [222]

4 years ago

6

Which of the following is/are true according to the Cell Theory? 1) All organisms are composed of one or more cells. 2) The cell

is the structural unit of life. 3) Cells can arise only by division from a preexisting cell. 4) Cells divide only by fission.

1 answer:

Dvinal [7]4 years ago

3 0

Answer:

1) All organisms are composed of one or more cells

Explanation:

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Hormones travel from endocrine glands through bloodstream to ___ organs.

oksian1 [2.3K]

Horomones travel from endocrine glands through bloodstream to target organs

7 0

3 years ago

Why is the world's loss of biodiversity a source of concern?

Vlad1618 [11]

Answer:

a) Humans depend upon other organisms for food and oxygen

Explanation:

Biodiversity refers to the richness in the species of organisms on Earth i.e the variety of biological organisms on the Earth. The importance of biodiversity cannot be overemphasized because of our dependence on the sustainability of biodiversity in our ecosystems.

The loss of biodiversity, which is becoming rampant by the day, is a major concern to us because we humans depend upon other organisms for food and oxygen. Humans are strictly heterotrophic and hence are reliant on variety of organisms for food. Plants also release oxygen gas via their photosynthetic process, which is key to our survival as a population.

7 0

3 years ago

If there were a large amount of glucose dissolved in the water outside of the cell, why would that cause water to diffuse out of

Vladimir79 [104]

The water moves to form a solvent for the glucose.

4 0

3 years ago

In the human life cycle, diploid cells undergo a cell division process called __________. The resulting haploid cells later fuse

7nadin3 [17]

Answer: Meiosis; fertilization

In the human life cycle, diploid cells undergo a cell division process called meiosis. The resulting haploid cells later fuse during fertilization which regenerates diploid cells.

Explanation:

Diploid cells possess two basic sets of chromosomes known as homologous chromosomes. They undergo a two-step meiosis (Meiosis I and II) to yield four haploid cells with half the original chromosome number of the parent cell. These haploid cells are called sex cells or gametes.

The male and female gametes (sperm and egg) then fuses during fertilization to form zygote, a single cell with two sets of chromosomes (diploid number). Then, it undergoes mitosis to regenerates diploid cells with the same chromosome number as found in the zygote.

3 0

3 years ago

Punnett Squares are used by geneticists to determine the likely genotypes of the offspring of two parents.

PilotLPTM [1.2K]

That's correct - it's a square where on one axis, the paternal allele (allele = one of the possible forms of the same gene), and on another the maternal allele is listed. Often, it's also indicated whether an allele is recessive or dominant.

Then, in the table that results, all the possible "combinations" of allele between the paternal and maternal party are created. If you count how often a certain combination appears, it indicates the likelihood of that combination.
See the picture (though it is directly from Wikipedia, please note). The likelihood of BB is 25%, of Bb is 50%, and of bb 25%.

6 0

3 years ago