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alina1380 [7]
4 years ago
15

How would you test the presence of starch in leaves?

Biology
1 answer:
Lesechka [4]4 years ago
4 0

Answer:

1. Remove a green leaf from the plant

2. Boil the leaf in boiling <u>water stop enzymatic reaction within cells in leaf</u>

3. Put the boiled leaf in boiling tube containing alcohol <u>extract (ethanol) chlorophyll ethanol dissolves Lipids in cell membranes.</u>

4. Return to leave to the hot water <u>soften the leaf and allows penetration of </u><u> </u><u>i</u><u>odine</u>

5. Remove leaf and perform the iodine test

Explanation:

<em>starch is white powdery substance consisting of glucose which is used by plants as food the percents of starch in leaves evidence enough of the process a photosynthesis being carried out in leaves as the formation of starch necessitates photosynthesis</em>.

I hope this helps :)

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Some single-celled organisms that make copies of themselves through mitosis. Which decribes the function of the cell cycle in su
slava [35]

Answer;

-Reproduction;

Explanation;

-Mitosis is a shape of cell division that outcomes in two daughter cells which might be genetically identical to every other and to the unique cell.In unicellular organisms together with micro organism, mitosis is a kind of asexual duplicate, making equal copies of a unmarried mobile.

- Single-celled or unicellular organisms use cell division as their method of reproduction. Mitosis is a type of asexual reproduction, making identical copies of a single cell. Cells make identical copies of themselves through mitosis.

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3 years ago
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Which of the following is the best definition of DNA?
mr_godi [17]

Answer:

Option B. A double-stranded molecule with coded instructions for anorganism's physical characteristics, is the correct statement.

Explanation:

DNA is a genetic material which contains information about the physical features and characteristics of an organism. It is composed of five carbon sugar, phosphate group and nitrogenous base. The DNA base are adenine, cytosine, guanine, and thymine.

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2 things that can cause a cell to lose its ability to regulate its cell cycle properly
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Answer:

Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor. hope this helps

Explanation:

3 0
3 years ago
Which term best describes the interval between the birth of the newborn and the return of the reproductive organs to their norma
kodGreya [7K]

Answer:

B. Puerperium, or fourth trimester of pregnancy

Explanation:

  • Puerperium or the fourth trimester of pregnancy is also known as the postpartum period.
  • This period starts immediately after the mother gives birth to a child.
  • During this period the size of the uterus and other reproductive organs along with the hormone levels return to their normal state.
  • It is the phase where regression of all the anatomical and physiological changes that took place i in the reproductive organs of the females takes place.
  • This phase is divided int three periods -

1. Immediate puerperium, or the first 24 hours after parturition

2. Early puerperium, which extends until the first week postpartum;

3. Remote puerperium, which includes the period required for involution of the genital organs and return of menses, usually approximately 6 weeks.

  • This phase is highly critical for the mother as this requires rest and proper care as there are risks of bleeding. Therefore, the midwife or the nurse must take proper care of the mother.
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3 years ago
In lizards, the gene for color and the gene for pattern are located on the same chromosome and exhibit recombination. The lined
Molodets [167]

Answer:

The all possible gametic haplotypes that can be made are described below.

Explanation:

According to the question, F1 progeny was produced by crossing a homozygous dominant parent with a homozygous recessive parent. As per the question, cross is to be made with a heterozygous parent, which will have solid unpatterned allele and blue colour with a homozygous recessive i.e lined, aqua lizard.

The possible haploid gametes for the heterozygous parent would be BL, bl, Bl, bL and for homozygous parent would be all bl.

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