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8090 [49]
3 years ago
9

Which of the following is TRUE about stem cells

Biology
1 answer:
postnew [5]3 years ago
4 0

Answer:

I think it’s D

Explanation:

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which macromolecule carries out many of the functions in the cell, including catalyzing chemical reactions, transporting molecul
Bess [88]
The cytoplasm I think
8 0
2 years ago
A variegated leaf with green and yellow patches is used for an experiment to prove that chlorophyll is required for photosynthes
olga_2 [115]

Answer: The colour of A before the starch test is GREEN while after the starch test is BLUE- BLACK. The equation for photosynthesis is

6CO2 + 6H2O → C6H12O6 + 6O2.

Explanation:

PHOTOSYNTHESIS is the process by which green plants use energy from sunlight to manufacture their own food. It is a building up process since simple inorganic compounds such as carbondioxide and water are built up into large organic compounds such as glucose and OXYGEN is given off as a by product.

Oxygen given out in photosynthesis occurs in the light stage during the process of photolysis of water. This occurs when the chlorophyll traps, absorbs and captures light energy and become energised. The energised chlorophyll supplies energy which is to split molecules of water into hydrogen ion ( H+) and hydroxyl ion ( OH-). The hydroxyl ion is reconverted to water and oxygen is given out as a by product.

To show that chlorophyll is NECESSARY for photosynthesis, a variegated leaf with green and yellow patches is used for an experiment.

The green portion is marked A and the yellow portion marked B. The leaf is tested for starch using the procedure below:

--> place leaf in boiling water for half a minute to kill it.

--> decolorize leaf by placing it in hot alcohol.

--> dip decolorize leaf in hot water to soften it.

--> place leaf on tile and add iodine solution to it.

RESULT: It would be found that only the green parts contain starch as blue+black colouration is observed while yellow area is unaffected by iodine.

5 0
2 years ago
X
ehidna [41]

Increased global temperatures have decreased disease incidence of the cattle, leading to their increased growth.

The correct option is A.

<h3>What is an example of growth?</h3>

A gradual increase in time, size, mass, or height is referred to as growth. An example of maturity is a rowdy teen who grew noticeably quieter in her late 20s. A boy that grows an inch taller between both the ages of 14 and 15 is an illustration of growth.

<h3>What causes growth?</h3>

Hormones created by the pituitary gland in the brain regulate a person's body's growth from the moment they are born. Growth hormone, sometimes referred to as human growth hormone, HGH, or GH, is the most crucial hormone for growth.

To know more about Growth visit:

brainly.com/question/15561411

#SPJ9

The complete question is -

Average cattle size over the past 100 years has increased steadily. Cows, on average, are more than 100 pounds heavier than they were a century ago. What is the most likely explanation of the increases observed in the cows?

A- Increased global temperatures have decreased disease incidence of the cattle, leading to their increased growth.

B- Increased water availability as water levels rise increased the growth and mass of the cattle.

C- Decreased competition with other mammal species in the wild has increased the aver-age growth rate of cattle.

D- Humans have bred the cattle to have improved genetics that increase growth rates and mass.

8 0
1 year ago
Which climate factor is the best option for city planners to consider when trying to
olga nikolaevna [1]

Answer:

its B but there is small possiblity for D to be the answer.

7 0
2 years ago
Read 2 more answers
______ are different forms of the same gene that are always found on the same position of two homologous chromosomes
wolverine [178]
<span>I think this might be referring to alleles </span>
6 0
3 years ago
Read 2 more answers
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