The right choice should be A and C. Flat worm and round worm.
Answer:
The pituitary gland also produces hormones for organs in the body, as well. It creates:
Oxytocin for the uterus and mammary glands to stimulate contractions that aid in birth and milk production
Vasopressin, an antidiuretic hormone, for the kidneys
Beta-melanocyte-stimulating hormone that darkens the skin
Endorphins for the brain and immune system to help inhibit pain sensations and regulate the immune system
Growth hormones for muscles and bones
Enkephalins that help inhibit pain sensations in the brain
Prolactin, which stimulates milk production in the mammary glands
Explanation:
Answer: Option B) phosphate; hydroxyl; 3'
We identify nucleic acid strand orientation on the basis of important chemical functional groups. These are the phosphate group attached to the 5' carbon atom of the sugar portion of a nucleotide and the hydroxyl group attached to the 3'
carbon atom
Explanation:
For both RNA and DNA, chemical groups such as phosphate (PO3-) attaches to the 5' carbon of the pentose sugar (deoxyribose in DNA, ribose in RNA).
While hydroxyl group (OH) attaches to the 3' carbon atom of the pentose sugar.
Thus, a nucleic acid structure structure reveals a several repeating units of nucleotides where nitrogenous base links to a pentose sugar, who in turns is linked to phosphate group
<span>The molecules that provoke a specific immune response are called antigens.
</span>This molecule initiates the production of an antibody and causes an immune response. T<span>oxins, chemicals, bacteria, viruses, or other substances that come from outside the body can be part of the antigens.
</span>
Answer:
<em>The correct option is A) increase in atmospheric O2</em>
Explanation:
The nerve cells and the muscle cells suggest that the the presence of oxygen in the atmosphere was an adaptive radiation which brought the existence of different animals. The conditions became favorable for different animals to survive on Earth only when the availability of oxygen improved in the atmosphere. As animal cells like the muscle cells require a constant supply of oxygen, we can hence say that increase in atmospheric oxygen was the adaptive radiation for supporting many group of animals.
