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2 years ago

Answer the following questions.

Biology

2 answers:

rewona [7]2 years ago

8 0

Answer: Gravity every other option we need for life

Explanation:

Every other option we need for life, otherwise we would not be alive.

natima [27]2 years ago

3 0

Answer:

Gravity?

Explanation:

These are the things needed for life: water, air, food, light, shelter, and space. It doesn't include gravity.

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Somatic cancer cells often are unstable and divide inappropriately (divide when they should not be dividing). In addition such c

sertanlavr [38]

Answer:

G1/S checkpoint

Explanation:

G1/S checkpoint is one of the points in the cell cycle, between growth phase 1 and DNA synthesis phase, where a cell that has been damaged is sensed by DNA repair enzymes and further degraded by apoptosis. In cancer cells, there is mutation in these DNA repair enzymes and thus nothing to correct the cells from dividing even when damaged and thus there is no arrest of division and cells continue dividing

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3 years ago

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What is a natural, nonspecific immune response, but it is part of the body's second line of defense?

Strike441 [17]

The adaptive immune response is the second line of defense against non-self pathogens. Adaptive immunity, also known as acquired immunity or specific immunity, is found only in vertebrates.

<h3>What is second line of defense?</h3>

Nonspecific resistance, which destroys invaders without targeting specific individuals, is the second line of defense: phagocytic cells ingest and destroy all microbes that enter body tissues.

The adaptive immune response is the body's second line of defense against non-self pathogens. Adaptive immunity, also known as acquired immunity or specific immunity, is found only in vertebrates.

Thus, adaptive immune system is a natural, nonspecific immune response, but it is part of the body's second line of defense.

For more details regarding second-line defense, visit:

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2 years ago

TWENTY FIVE POINTS!! What do the variables in the Hardy-Weinberg equation represent? Match the tiles.

Tomtit [17]

The Hardy-Weinberg principle is used to characterize the distribution of the different genotype frequencies in a population which are not evolving. In the Hardy-Weinberg equation,

the frequency of the homozygous dominant genotype is denoted by $p^{2}$ ;

the frequency of the homozygous recessive genotype is denoted by $q^{2}$ ;

the frequency of the heterozygous genotype is denoted by 2pq;

the frequency of the recessive allele is denoted by q;

the frequency of the dominant allele is denoted by p.

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3 years ago

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Which of the following statements is true for a eukaryotic cell?

Aleks04 [339]

<span>The correct option is B. Eukaryotic cells are developed cells with well defined structures. The organelles inside the cell are well compartmentalized, surrounded with their own membranes. These membranes make it possible for the organelles to regulates the movement of particles in and out of the cell.</span><span />

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3 years ago

The energy acquired in photosynthesis is used to make glucose. Where is the glucose made in plants?

klio [65]

Explanation:

<u>in the stroma</u>

Photosynthesis produces glucose and O2 from inorganic CO2, light energy and water.

6CO2 + 6H20 + (energy) → C6H12O6 + 6O2

Further Explanation:

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. This occurs in the thykaloids, where pigment molecules like chlorophyll reside.

Occuring in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II.

Additionally,

water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent; it reduces the molecule NADP to NADPH by providing H+ ions and produces molecules of the energy storage molecule ATP through an electron transport chain.
This occurs in the thykaloids, where pigment molecules like chlorophyll reside.
Later, in dark reactions, NADP and NADPH are used in the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules in the stroma. These store energy in their bonds, which can be released in respiration in the mitochondria.