Which of the following statements best describes the female gamete of mosses?
A. It is haploid.
B. It lacks flagella.
C. It is produced by the gametophyte generation.
D. It is larger than the male gamete.
E. All of the other choices provided are correct.
E. All of the other choices provided are correct.
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Sedimentation coefficients are proportional to the molecular weight of a particle and are not affected by the volume and shape of the particle.
Answer the following statement true (T) or false (F)
All of these flower structures are modified leaves EXCEPT
A) sepals. B) petals. C) stamens. D) carpels. E) pollen.
Answer the following questions true (T) or false (F)
1. A newly emerged infectious disease whose pathogen cause has not yet been identified is lethal in more than 90% of cases. Epidemiological evidence suggests that this pathogen is transmitted only through direct contact with the blood of ill or recently deceased patients. Patient blood and tissue samples would best be handled at BSL-2 until more information can be learned about the pathogen. 2. Skin is one of the most important physical barriers. 3. Antimicrobial peptides are able to stimulate leukocytes and destroy bacteria by disrupting their plasma membranes.
In eukaryotic cells, proteins always remain in the nucleus but DNA is made at ribosomes in the cytoplasm
a. true b. false