1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mylen [45]
2 years ago
6

Please I need help with biology hw

Biology
1 answer:
Ipatiy [6.2K]2 years ago
7 0
Letter a i guess probably
You might be interested in
Blood returning from the body (systemic circulation) first enters which chamber of the heart?
miskamm [114]
Right atrium because
5 0
3 years ago
How do the respiratory and circulatory depend on each other for gas exchange?
Juli2301 [7.4K]

Answer:

Explanation:

Haemoglobin in the red blood cells which is one of the components of the circulatory medium, the blood, has a great affinity for oxygen hence transports it around the body during circulation. It is the circulatory system that carries both oxygenated and deoxygenated blood around the body, between the lungs and the heart. The circulatory system takes blood with carbon dioxide to the lungs where oxygen that entered into the body through the nostrils will be exchanged with carbon dioxide in the alveoli. Consequently carbon dioxide will go out of the body through the nostrils via the trachea and haemoglobin in the red blood cells in the blood( blood capillaries) will

carry oxygen which is transported around the body.

5 0
3 years ago
Some have speculated that the origin of life occurred at geothermal vents. amino acids can form there. compared to the amino aci
cluponka [151]

There are a number of amino acids that have formed under certain environmental conditions if the required elements are present and the energy conditions ar compatible with chemical assembly. These conditions have also allegedly formed amino acids on meteors, asteroids and comets.


But, amino acids are a very minor component of more complex biochemical assemblies required for life. Pentose sugars are also required, which form under different environmental conditions than amino acids. More importantly, only left-handed homochiral amino acids and right-handed homochiral sugars can form functioning biochemical assemblies that are viable in an organism. But, natural conditions, like hydrothermal vents only produce racemic versions of sugars and acids, meaning they are always approx. 50% left and right handed. This is fatal to forming viable biochemical assemblies.


Further, it is not possible for all of the 20+ homochiral amino acids needed for a living organism to form naturally. The only ones found have been the simpler amino acids. Also, the 4 critical nucleotide amino acids, C, G, A, T, do not form naturally, are not homochiral, nor in the right proportions.


The geo/hydrothermal vent conjecture is nonsensical. These are open systems, susceptible to currents, mineral contamination, salinity, ph, and temperature, making them a totally unacceptable environment for the precise and exact placement of elements to assemble to form life.

3 0
2 years ago
Which of the following scientists contributed to the current understanding of<br> genetics?
tresset_1 [31]

Answer:

sir issac newton.

Explanation:

3 0
3 years ago
Please help me ASAP!!!!
Helga [31]
The second one is strike slip fault.
the third one is normal fault.
the first one is reverse fault.
5 0
2 years ago
Other questions:
  • A. Reactants: glucose products: oxygen
    6·1 answer
  • How to pass a us history regent
    11·1 answer
  • What is the medical term for infection of the urinary bladder?
    7·1 answer
  • Science question 1 What are the criteria for a good scientific question? Question 2 How do you formulate a good hypothesis?
    10·1 answer
  • Describe the role of enzymes in transcription and translation
    12·1 answer
  • Name at least 5 different fish that live in the ocean. It's simple!!!
    7·2 answers
  • Is it true that not all living things need food
    13·2 answers
  • Identify the labeled structures.<br> A:<br> B:<br> B<br> C:<br> А<br> D:<br> E:<br> D
    15·1 answer
  • Can some one give me a brief paragraph of how low pressure system can cause storms
    7·2 answers
  • The electric field is vibrating up and down in the y direction. The magnetic field is vibrating left and right in the z directio
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!