Which of the following is considered a modified stem?

Correct Answer: Intracellular transport

Explanation:

A cytoskeleton is the frame that gives shape to a cell. And also it offers support, and facilitates movement through three main components:

microfilaments,

intermediate filaments, and

microtubules.

 

The cytoskeleton helps the cell move in its environment and controls the movement of all of the cell's interior workings.

Correct Answer: An organelle called Eyespot allows some protists to detect light It allows the cells to sense light direction and intensity and respond to it by swimming either towards the light (positive phototaxis) or away from the light (negative phototaxis) Eyespot is a photoreceptive organelle found in the flagellate or (motile) cells of green algae and other unicellular photosynthetic organisms such as euglenids Eyespot-mediated light perception helps the cells in finding an environment with optimal light conditions for photosynthesis Eyespots are the simplest and most common "eyes" found in nature, composed of photoreceptors and areas of bright orange-red pigment granules

Correct Answer: Some inherited genetic mutations can be good for the offspring.

Explanation:

Mutations are accidents in the copying of DNA. A genetic mutation is a random change in the DNA that is passed on further generations of cells and or organisms. 

 

Genetic mutations are accidental changes in the DNA in the germ cells or early in the formation of the embryo. These changes if they are in the germ cell will be passed on to other organisms formed by sexual reproduction or asexual reproduction. An example would be the golden delicious apple. A lost of genetic information due to a mutation resulted in a different color of fruit.

 

Genetic mutations that cause diseases are not always passed on to offspring. 

Correct Answer: Fermentation is the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence and the giving off of heat The two most common types of fermentation are (1) alcoholic fermentation (and) (2) lactic acid fermentation (1) Alcoholic fermentation : the type of fermentation in which ethyl alcohol is the main end product This is very common in yeast (unicellular fungus) and also seen in some bacteria Yeast cells release enzymes called zymase complex which bring about the fermentation The reactions are similar to anaerobic respiration (2) Lactic acid fermentation : The type of fermentation in which lactic acid is the end product It is carried out by some bacteria (eg lactic acid bacteria), and also by animals (muscle glycolysis in animals, under oxygen deficiency, results in the formation of lactic acid this is whay we experience in muscle cramps, or "Charley horse")

Correct Answer: 15

Explanation:

Here crossing is AaBbCc x AaBbCc

As it is trihybrid cross,

we know, Number of zygotes formed =  4 n , where n = 3

4 3 = 64

Given ratio of offsprings = 1 : 6 : m : 20 : m : 6 : 1

Now,  1 + 6 + m + 20 + m + 6 + 1 = 64

34 + 2m = 64

2m = 30

=> m = 15.

Correct Answer: Decomposers are those organisms that recycle matter in the ecosystem..

Explanation:

Decomposers are organisms that break down dead or decaying organisms, and in doing so, they carry out the natural process of decomposition.

 

The statement "Decomposers are those organisms that recycle matter in the ecosystem" describes decomposers.

Correct Answer: Nucleus

Explanation:

In all plants and animal cells chromosomes are located in the Nucleus of the cells.

 

 

 

The Chromosomes are thread like structures present in the nucleus of the cells which are made up of proteins and a single molecule of DNA.

 

 

 

Their function is to carry the characteristic features of parent cells to daughter cells. 

Correct Answer: DNA

Explanation:

The inherited traits of an organism are controlled by DNA molecules.

 

The traits an organism displays are ultimately determined by the genes it inherited from its parents, in other words by its genotype. Animals have two copies of all their chromosomes, one from each parent.

 

Correct Answer: blood

Explanation:

In human body, glucose is stored in blood stream before it is converted to glycogen. Excess glucose is stored in the form of fats. After conversion, glycogen is stored in Muscles and Liver.

Correct Answer: All the above

Explanation:

Random mutations are the ultimate source of genetic variation. Mutations are likely to be rare and most mutations are neutral or deleterious, but in some instances, the new alleles can be favored by natural selection. Polyploidy is an example of chromosomal mutation.

 

Mutations are changes in the DNA. A single mutation can have a large effect.

1) mutation - an alteration in DNA sequence, various types

2) intragenic recombination - results in entirely new associations of genes not present in either parental genome.

Two forms of intragenic recombination:

a) crossing over
b) independent assortment
3) reticulation ? acquisition of genetic material from unrelated or relatively unrelated sources (e.g., hybrid species, horizontal gene transfer).