BIOLOGY MIDDLE SCHOOL

Explain why some organisms can be both a primary and secondary consumer

Answers

Answer 1
Answer: Some organisms can be both primary and secondary consumers depending on their position in the food chain. There are some organisms that are omnivores-- an organism that consumes both plants and animals. A perfect example of an omnivores are humans. Humans both consume plants and meat of animals. They can be primary consumers when they directly eat vegetables and fruits. They can also be secondary consumers when they consume the meat of a cow, wherein the cow is the primary consumer who eats plants. 
Answer 2
Answer: Because the organisms could be omnivores, meaning that they consume the producers (primary) and also feeds on the organisms in the primary sector (secondary)

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What is active transport

Answers

The movement of ions or molecules across a cell... requiring Energy.
Active transport is the movement of molecules across a cell membrane.

How is a scientific hypothesis best evaluated?

Answers

Answer:

Explanation:

A scientific hypothesis is a prediction or idea which should be tested to answer the natural phenomenon.

The hypothesis can be evaluated through the following ways:

1. Hypothesis should be based on the previous research related to the scientific question.

2. Hypothesis should be tested by designing and performing the experiments.

3. The result or data must disprove or prove the hypothesis.

Final answer:

When evaluating a scientific hypothesis, designing and performing experiments is best. The experiment's results should agree or contradict the hypothesis's predictions. The more experiments that consent, the more likely the hypothesis is accepted as a useful description of nature.

Explanation:

When evaluating a scientific hypothesis, designing and performing experiments is the best approach. Experiments should be systematic observations or measurements made under controlled conditions where a single variable changes. The experiment's results should either agree or contradict the hypothesis's predictions. If the results are inconsistent, scientists must discard the hypothesis and develop an alternative. If the results agree, it does not prove the hypothesis is correct. However, the more experiments that consent, the more likely the hypothesis is accepted as a useful description of nature.

Learn more about scientific hypothesis evaluation here:

brainly.com/question/11448126

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Which of the following can be caused by weathering?A) cracks forming in a boulder'
B) rocks melting to form magma
C) glaciers forming on a mountainside
 
PLEASE HELP FASTTTTTTTTT thxs xD

Answers

A. cracks forming in a boulder. 

Atrophy in a sentence

Answers

Without exercise, her muscles might atrophy.

What do snakes and giraffes have in common? (key shared characteristics)

Answers

they both are mammals

Which accurately describes meiosis II?In prophase II, the chromosomes line up in the middle of the cell.
In metaphase II, the chromosomes line up in the middle of the cell.
In prophase II, DNA is replicated and spindle fibers attach to the chromosomes.
In metaphase II, DNA is replicated and spindle fibers attach to the chromosomes.

Answers

In metaphase-II of meiosis, chromosomes are aligned in the middle of the cell. Option B is correct.

Meiosis:

It is a type of celldivision in which cells divide to form four haploid daughter cells. It is found in the germcells of organisms.

The process is completed in two phases,

  • In prophase- II, DNA is condensed into chromosomes and attached to the spindlefiber.
  • In metaphase, Chromosomes aligned into the metaphase plate.

Therefore, in metaphase-II of meiosis, chromosomes are aligned in the middle of the cell. Option B is correct.

To know more about Meiosis:

brainly.com/question/9624015
Mitosis is used for almost all of your body’s cell division needs. It adds new cells during development and replaces old and worn-out cells throughout your life. The goal of mitosis is to produce daughter cells that are genetically identical to their mothers, with not a single chromosome more or less.

Meiosis, on the other hand, is used for just one purpose in the human body: the production of gametes—sex cells, or sperm and eggs. Its goal is to make daughter cells with exactly half as many chromosomes as the starting cell.

To put that another way, meiosis in humans is a division process that takes us from a diploid cell—one with two sets of chromosomes—to haploid cells—ones with a single set of chromosomes. In humans, the haploid cells made in meiosis are sperm and eggs. When a sperm and an egg join in fertilization, the two haploid sets of chromosomes form a complete diploid set: a new genome.

Phases of meiosis

In many ways, meiosis is a lot like mitosis. The cell goes through similar stages and uses similar strategies to organize and separate chromosomes. In meiosis, however, the cell has a more complex task. It still needs to separate sister chromatids (the two halves of a duplicated chromosome), as in mitosis. But it must also separate homologous chromosomes, the similar but nonidentical chromosome pairs an organism receives from its two parents.

These goals are accomplished in meiosis using a two-step division process. Homologue pairs separate during a first round of cell division, called meiosis I. Sister chromatids separate during a second round, called meiosis II.

Since cell division occurs twice during meiosis, one starting cell can produce four gametes (eggs or sperm). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase.
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