BIOLOGY HIGH SCHOOL

Describe functions of the stomachWhere are most nutrients absorbed

What role do villi play in absorption

How do bacteria in the large intestine help keep us healthy

Describe two diseases of the digestive system

Answers

Answer 1
Answer:

Explanation:

A. Small intestine

B. Digestion

C. Because of the fluid present in our stomach.

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“Water covers 75 percent of Earth. 97 percent of water on Earth is salt water. Only 3 percent of water is available as fresh water, but most of this water is locked up in solid glaciers and polar ice caps.” Based on this information, which is the best approximation of the amount of water on the planet that is available for animals to drink?
What is the source Code of transcription
In the case of mendel's peas, a single gene determined the height of the plant. however, in humans, adult height is influenced by many genes. a trait such as human height is said to be:

A change in a sequence of DNA bases in a bacterial cell has resulted in a mutation. This mutation has increased the ability of the bacteria to break down and digest organic molecules in the environment. Bacteria with this mutation are better able to find and utilize food sources. According to the theory of natural selection, what is MOST likely to occur in future generations of this bacteria?A)The relative frequency of the mutation will increase as time passes.
B)Because the mutation has changed the DNA of the bacteria, a new species will be formed.
C)Because the mutation is abnormal, the mutation will become more rare with every passing generation.
D)Bacteria with the mutation will increase in number until the food supply is exhausted, causing the bacteria to become extinct.

Answers

The answer is A) The relative frequency of the mutation will increase as time passes. 

In natural selection, genotype variations that will increase the chance of survival and reproduction of some organism are preserved and will be inherited. So, the mutation could not be abnormal, since it helps bacterial survival. Also, the bacteria will not extinct because of this mutation nor the new species will be formed since this is not so big mutation.
This leaves A) as the right answer. The relative frequency of the mutated allele will increase since the more bacteria with the mutation will survive and it will be passed down to the new generation over time.

There are _____ levels of cell organization recognized by biologists.three
four
five
six

Answers

there are five levels of cell organization recognized by biologists.

There are five levels of cell organization recognized by biologists.

What is one reason some leaves are spiny, or needle-shaped? A. to increase the rate of formation of food in leaves B. to reduce water loss from leaves in dry climate C. to store food in dry climates?

Answers

Answer: B. to reduce water loss from leaves in dry climate.

Explanation:

Spiny or needle shaped leaves is a kind of adaptation in plants which is typically seen in plants that survive in dry climatic conditions. The needle shaped leaves reduces the surface area of the leaves which prevents the loss of water through transpiration.

B, because of the dry climates, they need to retain as much water as they possibly can.

Centromeres split apart during what?

Answers

Centromeres split apart during anaphase (a stage of the mitosis).
Centromeres split apart during Mitosis. Specifically during the Anaphase

Which of the following occurs in meiosis but not in mitosis? A) chromosome replication
B) synapsis of chromosomes
C) production of daughter cells
D) alignment of chromosomes at the equator
E) condensation of chromatin

Answers

The process that occurs in meiosis but not in mitosis is: synapsis of chromosomes

MEIOSIS AND MITOSIS:

  • Meiosis is a kind of cell division that results in the production of four daughter cells (haploid) that are genetically different from one another.

  • Meiosis occurs in different stages namely: prophase, metaphase, anaphase and telophase.

  • In the prophase stage, homologous chromosomes lie side by side to form a structure called tetrad. This process is called synapsis.

  • Synapsis of chromosomes is unique to only meiotic division and hence, does not occur in mitotic division.

Learn more at: brainly.com/question/12327654?referrer=searchResults

Final answer:

The process that is unique to meiosis and not found in mitosis is synapsis of chromosomes, which happens during prophase I of meiosis. This involves the pairing of homologous chromosomes and the formation of tetrads leading to genetic variation.

Explanation:

Among the options provided, the process that occurs in meiosis but not in mitosis is the synapsis of chromosomes (option B). Synapsis happens during the prophase I of meiosis, where homologous chromosomes pair up aligning their genes in a process known as synapsis. This is unique to meiosis and results in the formation of tetrads which eventually leads to genetic variation due to crossing over. In contrast in mitosis which is involved in somatic cell division, homologous chromosomes do not pair up or form tetrads.

Learn more about Synapsis of Chromosomes here:

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What is Mitochondria used for

Answers

A mitochondrion is a membrane-bound cell organelle that generate most of the chemical energy (adenosine triphosphate or ATP) for the cell’s biochemical reactions. The energy is produced by the mitochondria and stored in the small ATP molecules.
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