BIOLOGY HIGH SCHOOL

If a pea plants alleles for height are tt, what is true about the parents?

Answers

Answer 1
Answer: 1.c
2.d
3.a
4.c
5.b
lesson 1 mendel's experiments  unit 4 genetics 
Answer 2
Answer: The parents alleles are recessive

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Biologists once assumed that the phenotype of a dominant allele would always be the most common phenotype in a population. Which finding led biologists to a different conclusion?

Answers

The answer is C. The discovery of those populations in which phenotype of recessive allele help a population survive.

How many possible codons exist in the genetic code? a. 3 b. 20 c. 46 d. 64

Answers

The correct answer is:
d. 64

in the genetic code there could be 64 different codons (each consists of 3 nucleotides)

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Answer:

there are 64 possible codons (4 × 4 × 4 = 64) in the genetic code

Explanation:

up to 60 of our body is made up of water. Describe the significance of water being a universal solvent in our bodies.

Answers

water dissolves more substances than any other liquid. this is important to every living thing on earth. This concludes that wherever water goes, either through the ground or through our bodies, it takes along valuable chemicals, minerals, and nutrients.

Mangrove pneumatophore roots _______.

Answers

Pneumatophore roots allow mangroves to gather oxygen from the atmosphere even if the soil or mud their in are flooded. The mud where mangrove grows are anaerobic which has poor in oxygen. Oxygen is vital for the survival of mangroves. Some of these roots erect upward. 

Answer:

Mangrove pneumatophore is the specialized root structures that are known to grow out of the water surface and help in the respiration of mangrove plants. They allow the collect oxygen from the atmosphere.  

It mainly grows in mud and there the conditions are anaerobic means lack of oxygen. Oxygen is necessary for their survival that is done by the mangrove pneumatophore roots.  


What is the muscular valve between the esophagus and the stomach

Answers

Answer:

The lower esophageal sphincter, or gastroesophageal sphincter

Explanation:

The esophagus is a structure, part of the alimentary canal (gastrointestinal tract) that connects the pharynx to the stomach and through which the food passes. The esophagus is a fibromuscular tube that is involved in the food transport via peristaltic contractions (radially symmetric muscle contractions and relaxation).

The body's ability to maintain a relatively constant internal environment is called homeostasis. This stability can be challenged by:(Select all that apply)
A. reduced water or food intake
B. infectious organisms
C. elevated or depressed blood pH
D. extreme temperatures.

Answers

Homeostasis is the body's ability to maintain a constant internal environment. This stability can be challenged by reduced water and food intake and an elevated or depressed blood pH.

Final answer:

Homeostasis, the body's ability to maintain internal balance, can be challenged by reduced food or water intake, infectious organisms, changes in blood pH, and extreme temperatures. These challenges can disrupt the body's normal functions and cause varying health impacts.

Explanation:

The body's ability to maintain a relatively constant internal environment, called homeostasis, can indeed be challenged by various factors. Reduced water or food intake can alter the balance of nutrients and hydration in the body, potentially leading to dehydration or malnutrition. Similarly, infectious organisms such as bacteria, viruses, or parasites can disrupt homeostasis by causing disease.

Elevated or depressed blood pH, which refers to the acidity or alkalinity of the blood, can disrupt bodily functions if it falls outside of a certain range. Finally, extreme temperatures can challenge body's ability to regulate its own temperature, potentially leading to conditions like hypothermia or heat stroke.

Learn more about Challenges to Homeostasis here:

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