BIOLOGY HIGH SCHOOL

Natural selection is an evolutionary mechanism by which:. A. Advantageous traits are eliminated in a population
B. Advantageous traits become more common in a population
C. Inherited traits pass consistently through generations
D. Organisms choose which traits to look for in their offspring

Answers

Answer 1
Answer:

The correct answer would be option B

Natural Selection is a phenomenon in which the the traits that is advantageous for the population is common in a population.

These changes evolve over a period of time. The organisms having some change in the characters due to mutation survives and the organism lacking these features die.

These characters are then transferred from one generation to another and becomes common in a population.
Answer 2
Answer: The correct answer is B. Natural selection occurs through generations and is in which organisms best suited to their environment survive.

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Several events happen during sexual reproduction in flowering plants. Put these processes in the correct order, ending with the process seen here.
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As part of your summer research project, your professor has asked you to perform comparative genomic hybridization (CGH). He gives you DNA from one person who you know nothing about (referred to as the test subject). You use this DNA as a template to make green fluorescent DNA. You also make red fluorescent DNA with DNA from a control person. When you perform CGH, you are surprised to find that the ratio of green to red fluorescence is 2 along all of chromosome 18. You conclude:____________.A. the control person must be missing chromosome 18.B. the test subject is likely to have cancer.C. the test subject likely has Edward Syndrome.D. the test subject likely has Down Syndrome.

Earth’s continents are constantly in motion because they sit on top of gigantic plates which float on Earth’s mantle. Energy from the Earth’s core creates convection currents in the molten layer, and the currents move the plates. Over extremely long periods of time, this movement creates new _______. a. biomes b. plates c. atmospheric layers d. elements

Answers

The correct answer is A. Biomes.

Earth’s continents are constantly in motion because they sit on top of gigantic plates which float on Earth’s mantle. Energy from the Earth’s core creates convection currents in the molten layer, and the currents move the plates. Over extremely long periods of time, this movement creates new biomes.

The continents of the Earth are constantly in motion . The reason for this motion is the position of the tectonic plates over the mantle of the Earth. The movement of these plates, causes the continents to move. Over the time, these movements becomes substantial and the drifting of the continents is visible. This leads to the formation of the new biomes. The flaura and fauna changes with these movements.

Hence, the correct answer is 'Option A - Biomes'.

Which is the correct order of the levels of organization in plants and animals?

Answers

The correct order of levels of organization in both plants and animals is as follows: cells, tissues, organs, organ systems, and organisms.

What are the levels of organization?

At the cell level, basic structural and functional units exist. These cells form tissues, which are groups of similar cells with a shared function. Multiple tissue types come together to create organs, each serving a specific purpose.

Organs collaborate within organ systems, where groups of organs work together to perform complex functions. Finally, the culmination of these levels of organization results in the complete living entity, the organism. This hierarchical organization enables specialization and efficient functioning within the biological systems.

So, the order is: cells → tissues → organs → organ systems → organisms.

Read more about levels oforganization here: brainly.com/question/15383548

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Answer:

The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.

Explanation:

What do bacteria have in common with the cells of other living organisms

Answers

Answer:

Bacteria and other living cells have some universal features that are, they are present in all the living cells.

These features include:

Plasma membrane: The lipid bilayer which separates the cell from the external environment. It is present in all the living organism.

Cytoplasm: It is a gel-like substance present within the plasma membrane of the cell (excluding nucleus). It contains and supports all the cell organelles and cell parts.

Ribosome: It is a vesicular structure made up of protein and ribosomal RNA. It is the main site of protein synthesis in all the cells. Prokaryotes generally contain 70S ribosomes and eukaryotes generally contain 80S ribosomes.

Genetic material: All the living organisms contains genetic material (usually DNA) either confined in the nucleus or floating freely in the cytoplasm.
They have ribosomes.They contain cytoplasm.
Some things bacteria have in common with cells of other livingorganisms is they both have chromosomes, they both have organellesand a nucleus, and are alive.


This should help! :)

What structures protect the brain and spinal cord

Answers

Skeletal structures or Bones

The skull protects the brain while vertebrae protect the spinal cord.

What do scientists use to develop a hypothesis for their experiments

Answers

They simply use their brains haha and facts that are already known to be true

A cell has 2n=8 chromosomes...how many chromosomes will this cell have in anaphase1,anaphase2,metaphase2?(meiosis)

Answers

The answer is 8 (anaphase 1), 8 (anaphase 2), 4 (metaphase 2).

Meiosis is a cell division which results in a reduction of the number of chromosomes in half and it consists of meiosis I and meiosis II.
Before meiosis I begins, the cell is diploid (2n) and there are 8 chromosomes. In anaphase I, the sister chromatids separate from each other to the opposite sides of the cells, and after that, there are 8 chromosomes and 16 chromatids. After telophase I, there are, however, 4 chromosomes that enter meiosis II.

Meiosis II is similar to mitosis. So, in metaphase II there is the same number of chromosomes - 4 chromosomes. But, the chromosome number must double so in anaphase II there will be in total 8 chromosomes - 4 chromosomes at the one side of the cell and the 4 on the other side. After telophase II, there are 4 chromosomes.
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