Answer and Explanation:
The possible genotype and phenotype are as follows
Genotype Phenotype
BbR∧ - Barbed and not resistant to pesticide
BBRR - Barbed and not resistant to pesticide
bbR∧ - Smooth and not resistant to pesticide
bbRR - Smooth and not resistant to pesticide
bb∧∧ - Smooth and resistant to pesticide
Bb∧∧ - Barbed and resistant to pesticide
BB∧∧ - Barbed and resistant to pesticide
A single species that has evolved into several different forms that live in different ways has undergone "b. convergent evolution" since the multiple "divergent" species are seen to "converge" into a single species if you go back far enough in time.
Layers of fossils in pillars, the rock covering them is dated and we get an exact time of each layer.
Answer: OK so The ventricles of the brain are a communicating network of cavities filled with cerebrospinal fluid (CSF) and located within the brain parenchyma. The ventricular system is composed of 2 lateral ventricles, the third ventricle, the cerebral aqueduct, and the fourth ventricle (see the images below).Survival in untreated hydrocephalus is poor. Approximately, 50% of the affected patients die before three years of age and approximately 80% die before reaching adulthood. Treatment markedly improves the outcome for hydrocephalus not associated with tumors, with 89% and 95% survival in two case studies
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Explanation: