Frog red blood cells have a nucleus that human red blood cells don't. This is because human RBCs eject their nucleus to allow more room for oxygen-carrying hemoglobin, while frog RBCs retain their nucleus potentially for environmental adaptability.
The organelle that frog red blood cells (RBCs) have, which human RBCs do not, is the nucleus. In mammals like humans, the nucleus is ejected from the RBCs as they mature to allow more space for hemoglobin, the protein that carries oxygen.
This makes human RBCs more efficient at oxygen transport. However, many amphibians like frogs retain the nucleus in their RBCs throughout their lifespan. The exact reason why frogs retain their nuclei is not entirely known. However, it might give the cells greater flexibility in responding to changes in the frog's environment.
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Answer:
A nucleus
Explanation:
El Niño
large asteroid and comet impacts
volcanic eruptions
global warming
Answer:one,two,four
Explanation:
Answer:
tsunamis Yeah
El Niñolarge Yeah
asteroid and comet impacts Nope
volcanic eruptions Yeah
global warming Nope
Explanation:
Answer:
El entrecruzamiento cromosómico es un proceso biológico que ocurre durante la meiosis, cuando las parejas de cromosomas homólogos, o del mismo tipo, están alineadas. Durante la meiosis los cromosomas emparejados están alineados en las llamadas placas meióticas, y tienen un mecanismo biológico que los mantiene unidos.
B is the correct answer
1.)Changes in behavior may include mild memory loss, mood swings, or intense emotional outbursts. Tumor location, medications (such as chemotherapy and steroids), and stressful life situations can influence behavior.
2.)General signs and symptoms caused by brain tumors may include: New onset or change in pattern of headaches. Headaches that gradually become more frequent and more severe. Unexplained nausea or vomiting
3.)Blood tests can also give your doctor an idea of how well your organs are functioning and if they've been affected by cancer. Examples of blood tests used to diagnose cancer include: Complete blood count (CBC). This common blood test measures the amount of various types of blood cells in a sample of your blood.
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