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olasank [31]
3 years ago
14

Do you consider some animals "better" than others? For example, animal testing on a mouse is okay, but animal testing on a dog o

r cat is wrong.
Biology
2 answers:
raketka [301]3 years ago
8 0

Answer:

well I don't know what are you exactly talking about but I love cats and dogs the same and I think all animals have their own purpose

vampirchik [111]3 years ago
3 0

Answer: honce omm

Explanation:

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A boy hits a 0.05kg golf ball, giving it a velocity of 75 m/s. what is the momentum of the golf ball?
Aleonysh [2.5K]

Answer:

The answer to your question is b. M = 3.75 kgm/s

Explanation:

Data

Mass = 0.05 kg

velocity = 75 m/s

Momemtum = ?

Formula

    Momemtum = mass x  velocity

Substitution

    Momemtum = (0.05 kg) x (75 m/s)

Simplification

    Momemtum = 3.75 kg m/s

There is no possibility to simplify the units, so the units stay the same.

7 0
3 years ago
At the end of meiosis i, there are two haploid cells, each with two sister chromatids per chromosome. True or false?.
sergij07 [2.7K]

The answer is true. There are two haploid cells with two sister chromatids per chromosome at the conclusion of meiosis I.

After meiosis I, a chromosome's two chromatids are genetically separate. After homologous chromosomes separate during meiosis I, two haploid cells are produced.

what is meiosis phases ?

DNA is copied prior to meiosis, just as it is during mitosis. Then, during meiosis, two cell divisions—meiosis I and meiosis II—take place. The DNA is divided into daughter cells during the first division, which is composed of several steps. The two alleles of each gene are divided into distinct cells in the division that immediately follows the initial division. each gene has 4 copies, each of which is present in 2 complete sets of DNA with 2 alleles in each set. 

what are the Phases of Meiosis I ?

1. Prophase I

Condensed chromosomes adhere to the nuclear membrane.

A tetrad is created when synapsis takes place (when a pair of homologous chromosomes line up closely together). Four chromatids make up each tetrad. By crossing over, genetic recombination might take place. The nuclear membrane thins as the chromosomes separate from it. The nuclear envelope and nucleoli disintegrate, and the centrioles move apart similarly to mitosis. The chromosomes also start moving toward the metaphase plate.

2. Metaphase I

At the metaphase plate, tetrads align.

As you can see, homologous chromosome centromeres are oriented toward the opposing cell poles.

3. Anaphase I

The movement of chromosomes to opposing cell poles. Similar to mitosis, the chromosomes are drawn to the cell poles by the interaction of microtubules like the kinetochore fibers.

Unlike mitosis, sister chromatids do not split once homologous chromosomes move to opposing poles.

4. Telophase I

The homologous chromosomes are still being moved to the poles by the spindle fibers.

Once movement is complete, each pole contains a haploid number of chromosomes.

Most of the time, cytokinesis—the division of the cytoplasm—occurs concurrently with telophase I.

At the end of telophase I and cytokinesis, two daughter cells are produced, each of which has half as many chromosomes as the original parent cell.

Different activities take place in anticipation of meiosis II depending on the kind of cell. There is one thing that never changes, though: the genetic material never reproduces.

To know more about meiosis and cell division:

brainly.com/question/8821727

#SPJ4

3 0
1 year ago
Read 2 more answers
HELP PLEASE I NEED ANSWERS ASAP
Amanda [17]

Answer:

Explanation:

Those were my old notes hopefully it helps you!! goodluck.

Download pdf
7 0
2 years ago
Read 2 more answers
What do you think the biggest weakness is of sharks?
murzikaleks [220]

Answer:

The biggest shark weakness is going in the state of tonic immobility when they're upside down. Other than that, have fun trying to poke it's eyes, gills or to punch its snout.

Explanation:

4 0
3 years ago
For hundreds of years one species of moth has always gone back to the same type of tree in the forest to breed. A small portion
Brrunno [24]

Answer:

Evolution.

Explanation:

A small portion of the moth population began going to a different type of tree within the same forest to breed instead of the older one because of the evolution. Due to this evolution, the moth is able to breed on another tree. The characteristics of some moth specie changed over several generations due to may be change in their genetic makeup so we can say that it is because of evolution.

4 0
2 years ago
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