BIOLOGY HIGH SCHOOL

Crossing over and the separation of duplicated homologous chromosomes in the first division produce genetic variation. true false User: The nuclear envelope disintegrates during _____.
metaphase
prophase
anaphase
telophase

Answers

Answer 1
Answer: Question 1. The statement that 'Crossing over and the separation of duplicated homologous chromosomes in the first division produce genetic variation' is true. Crossing over is the exchange of genetic material between homologous chromosomes that occurs during meiosis. As the result, the daughter cells are genetically different from mother cells. It is one of the ways to produce genetic variation. Question 2. The nuclear envelope disintegrates during prophase. This is the process that occurs at the beginning of mitosis. During prophase, the first phase of mitosis, the chromosomes condense and the nuclear envelope disintegrates. At the end of mitosis, the chromosomes will decondense and the nuclear envelope will re-form.
Answer 2
Answer: Prophase is the answer

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Compare and contrast what happens in mitosis and meiosis and discuss the importance of each process to a living organism.
Echolocation is an adaptation bats use to _______.a. hunt insects in flight b. locate flowering plants c. find warm places for hibernation d. all of the above
Gametes are:O the body cells of an organismO cells found in prokaryotesO complex cells found only in plantsO the reproductive cells of an organism

Samuel wants to plant cuttings from his rose plant. What should he do to hasten the rooting process?

Answers

Spray auxin at the base of the rose cutting. Hope that helps :)

the correct answer choice is "C"

The type of epithelium that contains two or more layers of epithelial cells is

Answers

Answer:

The type of epithelium that contains two or more layers of epithelial cells is called stratified epithelium...

Explanation:

The type of epithelium that contains two or more layers of epithelial cells is called stratified epithelium.

Stratified epithelium is a type of tissue that consists of multiple layers of epithelial cells. These cells are stacked on top of each other, with the bottommost layer in direct contact with the underlying connective tissue. The cells in the basal layer are usually cuboidal or columnar in shape, while the cells in the outer layers can be squamous, cuboidal, or columnar, depending on the specific type of stratified epithelium.

Match the following methods of movement with the appropriate protozoan. 1. cilia amoeba 2. flagellum euglena 3. pseudopodia paramecium

Answers

1. cilia-----------paramecium

Paramecium is one of the least complex unicellular creatures, which is found in all water body related ecological conditions.  

The cilia assume a key job in paramecium development.  

Paramecia are single-celled microorganisms that live in freshwater and marine conditions. They have a place with the phylum Ciliophora, the ciliated protozoa. A cilium is a short, hair-like structure that projects from a life form's cell layer. A paramecium has a large number of cilia that musically beat, giving an approach to it to move around and to clear sustenance into its oral score.


2. flagellum---------euglena

Euglena are unicellular living beings grouped into the Kingdom Protista, and the Phylum Euglenophyta. All euglena have chloroplasts and can make their very own sustenance by photosynthesis. They are not totally autotrophic however, euglena can likewise retain sustenance from their condition; euglena normally live in calm lakes or puddles.  

Euglena move by a flagellum (plural ‚ flagella), which is a long whip-like structure that demonstrations like somewhat engine. The flagellum is situated on the foremost (front) end, and whirls so as to pull the cell through the water. It is appended at an internal pocket called the store.


3. pseudopodia--------amoeba

Amoebae utilize pseudopodia (signifying "false feet") to move. This is essentially a similar way phagocytes (a sort of white platelet) immerse an attacking microorganism when we battle a disease. On account of a single adaptable cell moving, it's cytoplasm streams forward to frame a pseudopodium, at that point it levels pull out. With the end goal to eat, it will shape two pseudopodia and wrap those around to meet one another, encasing its sustenance, at that point the cytoplasm levels out once more.
Paramecia move by cilia. Euglena move by flagella. Ameba mive by pseudopods.

An animal cell that is surrounded by fresh water will burst because the osmotic pressure causesa. water to move into the cell.
c. solutes to move into the cell.
b. water to move out of the cell.
d. solutes to move out of the cell

Answers

a, because its a uneaven balance
The answer is a. water to move into the cell thats why cell will burst :)))
i hope this is helpful
have a nice day 

Describe the formation of an ionic compound.

Answers

When metals react with non-metals, electrons are transferred from the metal atoms to the non-metal atoms, forming ions. The electrons from the metal atoms will always transfer to the non-metal atoms. Although there are some exceptions depending on the periods, the resulting compound is called an ionic compound. 

Check all the factors that apply when evaluating whether an adaptation is a success.A. what choices were made in another adaptation
B. the particular choices made in the adaptation
C. how much more enjoyable the adaptation is than the original
D. the effects of the choices made in the adaptation
E. why the choices made in the adaptation are effective

Answers

Factors which are being applied when evaluating whether the adaptation is success include;


1. Why the choices which are made in the adaptations are effective.

2. The effects of the choices made in the adaptation.

3. The particular choices made in the adaptation.


Adaptation is termed as dynamic evolutionary process which fits organisms to their environment which enhance evolutionary fitness.


Organisms face succession of environmental challenges as they grow and they show adaptive plasticity when traits develop as they show adaptive plasticity when traits develop.
the factors that apply when evaluating whether an adaptation is a success are :

- The particular choices made in the adaptation
- the effects of the choices made in the adaptation
- why the choices made in the adaptation are effective

Hope this helps
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