How is the seed of an angiosperm different than the seed of a gymnosperm?
What will be an ideal response?
The angiosperm seed is considered “enclosed”. A modified leaf called a carpel surrounds and protects
the ovules and later the seeds. Carpels are parts of flowers. The seed is surrounded by a fruit. The
gymnosperm seed is considered “naked”. The seed is not surrounded by the tissue of a fruit.
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Which of the following statements describes how root meristems differ from apical meristems in plants?
A. Cells in root meristems have determinate growth. B. Root meristems are shielded by a root cap that protects cells from abrasion by the soil. C. Cells in root meristems are adjacent to the zone of maturation. D. Cells in root meristems are stimulated by hormones other than auxin.
What homeostatic requirement might explain why discontinuous breathing is only seen in resting insects?
A. Toxic levels of carbon dioxide can build up in active insects. B. Resting insects have more metabolic activity. C. Oxygen can build up in active insects. D. Oxygen is used as quickly as it arrives in active insects. E. Resting insects produce more carbon dioxide.
The aquaous humor is much ____ liquid behind the cornea to the _____.
Fill in the blank(s) with the appropriate word(s).
Which antigens are most important in matching for tissue transplants?
A) HLA A and B B) blood group antigens A or B C) HLA DR1 and DQ1 D) all of the above