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dusya [7]
3 years ago
15

Deadline coming up!!!! Help me please!!!!!!!! Needed desperately!!

Biology
1 answer:
TiliK225 [7]3 years ago
7 0
1. A genome is the complete set of an individuals DNA


2a. Polymers are very long chains made up of a repeated pattern of monomers

2b. Proteins are made up of amino acids (residues) that bond together to form a polypeptide chain

2c.The information for making a protein is stored in messenger RNA (mRNA)

2d. Ribosomes manufacture protein in cells


3a. The first diagram shows the process of mitosis. The second diagram shows the process of meiosis. Mitosis results in 2 daughter cells whereas meiosis results in 4 daughter cells (as you can see in the diagrams)

3b. Mitosis takes place in somatic cells (any cells in the body that aren't involved in reproduction, whereas meiosis occurs in the sex cells.


4. Meiosis is an essential process in sexually reproducing organisms. It is a process that forms gametes (sex cells) that potentially could result in offspring, all of which would be genetically different.


I can't see the rest of the 5th question but I hope I've helped with the rest. I'm happy to answer any other questions you might have :)



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What are agronomic characters of potato? How it is beneficial for the farmer?
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Yara Crop Nutrition
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Agronomic Principles
Crop Characteristics

Potatoes produce a fibrous root system. These roots are at best no more than 24in long. Thus potatoes are shallow rooted compared to cereals for example, which can root to at least 47in depth. As a result, potatoes are often unable to exploit nutrients and soil moisture at depth within a soil profile.

While root growth occurs when soil temperatures are between 50 to 95˚F (10 to 35˚C), best, most active root development is at soil temperatures of between 59 and 68˚F (15 and 20˚C).

Leaf (haulm) growth occurs at temperatures of between 44.6 to 86˚F (7 to 30˚C) , but optimal growth is at around 68 to 77˚F (20 to 25˚C). Optimum temperatures for stolon growth are similar.

effects of soil temperature on root development
The potato tuber is an enlarged portion of the stolon. The initiation of this tuber is triggered by short day lengths (photoperiods), and involves growth hormones. The colder the soil temperature, the more rapid the initiation of tubers and the greater the number of tubers formed. The optimum soil temperature for tuber initiation is 59 to 68˚F (15 to 20˚C).

Under these conditions, the potato plant will have short stolons and shoots. Longer day lengths delay tuber initiation and favor the growth of the stolon and shoot. High temperatures also reduce tuber formation. Late varieties seem to be more sensitive to long day lengths or high temperature conditions.

Low nitrogen and high sucrose levels in the plant favor the formation of more tubers.

Once formed, tubers grow rapidly, reaching a maximum rate of up to 1,249 lb/ac/day in temperate climates. See figure below:

potato tuber growth rate, germany
Physiological Aging

By planting sprouted seed, crop growth can be advanced. The magnitude of this response and its effect on increasing crop yield is related to the physiological age of the seed at planting.
6 0
3 years ago
Trace the path of food through the digestive system. at each organ:
Lyrx [107]

Ingestion

Mouth- chews and mixed food with saliva

Pharynx- Directs food from mouth to esophagus

Salivary glands- secrete saliva

Epiglottis - Protects airways during swallowing

Trachea- let the air to pass to and from lungs

Esophagus-  Pass through the  food from the mouth then to the stomach

Esophageal sphincters- let the pass way from mouth to esophagus and from esophagus to stomach, to avoid back flow from stomach to esophagus and from esophagus to mouth.

Diaphram- Segregate the abdomen from the thoracic activity

Stomach- grinds food to a liquid mass churns, mixes, and; adds acid, enzymes, and fluid

pyloric sphincter: Allows passage from stomach to small intestine; prevents back flow from small intestine

Liver- detergent-like substances, to help digest fats and Manufactures bile salts,

Gallbladder- stock bile until needed

Bile Duct- Conducts bile from the gallbladder to the small intestine

Appendix- House bacteria and lymph cells

Small intestine- Secretes enzymes that digest all energy- yielding nutrients to smaller nutrient particles; cells of wall absorb nutrients into blood and lymph

llececal valve (sphincter) – is the  pass way  from small to large intestine; to avoid back flow from large intestine

Pancreas- produced enzymes to digest all energy- yielding nutrients and releases bicarbonate to neutralize acid chyme that enters the small intestine

Pancreatic duct- secretes pancreatic juice from the pancreas to the small intestine

Large intestine- passes waste along with water to rectum and  Absorbs water and minerals;

Rectum – Stocks  water prior to elimination

anus-  opens to allow elimination, holds rectum closed.

7 0
3 years ago
Which of the following is the main mechanism by which populations change
elena-14-01-66 [18.8K]

Answer:

D Natural selection

Explanation:

This is because the dominant Gene according to Charles Darwin is strong enough to adapt to any environment.Making it a survival of the fittest

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