Modern humans have been the only species of homo, so true .
Answer:
the cell membrane is the semi-permeable protective cover that keeps the cell held together. the cytoplasm is semi-fluid within the cell membrane that keeps the cell in shape.
Explanation:
History of the Atom Reading Comprehension is stated below.
The Greek word atoms, which implies unable to cut or divide, is where the name "atom" originates. The atom was believed to be invisible at that time. In contrast to Democritus, Aristotle presented his own theory regarding the nature of matter. Democritus' thesis provided a clearer explanation of the situation, but Aristotle's ideas won out because of his greater stature.
According to his ethics, the only way to acquire eudaimonia—a state of bliss or contentment that is the highest form of human life—is by becoming wonderful. Dalton eventually looked more closely at gases as a result of his fascination with atmospheric pressures. John Dalton is well recognized for his contributions to human optics and for introducing the atomic theory to chemistry.
After discovering the electron, Thomson went on to suggest a model for the atom's structure. In Thomson's "plum pudding" atom model, a positively charged "soup" was surrounded by negatively charged electrons. Thomson made this discovery after his research assistant Francis Aston used a mass spectrometer to fire ionized neon through a magnetic and electric field and noticed two unique deflections. Thomson came to the conclusion that neon existed in two isotopes with distinct masses.
Learn more about atmospheric pressure here-
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Answer:
your brain consumes 20% of our daily intake calories,that's 400-500 for a man and 350-400 for a woman
Answer;
Heterozygote advantage occurs when heterozygotes have a higher fitness than do both homozygotes. In frequency-dependant selection, the fitness of a phenotype declines it it becomes too common in the population.
Explanation;
The heterozygotes have both alleles, which is needed for genetic variation. Heterozygotes are essential for there to be genetic variation in a population. In other words it is when When a single copy of a disease allele doesn't result in a disease but instead is good for the person or organism that carries it, we say that allele has a heterozygote advantage. For example a sickle cell trait, which protects against malaria in heterozygotes, but causes a deadly disease in homozygotes.
-Frequency-dependent selection occurs when the fitness of a genotype depends on its frequency. It is possible for the fitness of a genotype to increase (positively frequency-dependent) or decrease (negatively frequency-dependent) as the genotype frequency in the population increases.
