Cells found in the choroid plexuses that secrete cerebrospinal fluid are
A) astrocytes.
B) microglia.
C) ependymal cells.
D) oligodendrocytes.
E) Schwann cells.
Ans: C) ependymal cells.
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The gene for normal skin pigment (
A) can also code for the recessive trait of albinism (a). An albino man and a homozygous normal pigmented woman marry and have four children. What is the phenotype of the children? A) 75% normal skin pigment and 25% albino B) 100% normal skin pigment C) 50% normal skin pigment and 50% albino D) 25% normal skin pigment and 75% albino E) 100% albino
Bile is produced by the __________ and stored in the __________
Fill in the blank with correct words.
Answer the following statements true (T) or false (F)
1. Covalent bonds are generally less stable than ionic bonds. 2. Hydrogen bonds are comparatively strong bonds. 3. The fact that no chemical bonding occurs between the components of a mixture is the chief difference between mixtures and compounds. 4. Alpha particles, although relatively weak energy particles, are second only to smoking as a cause of lung cancer. 5. No chemical bonding occurs between the components of a mixture.
Chromatin is found in the nucleus.
Answer the following statement true (T) or false (F)