Answer:
C : 1953
Explanation:
The discovery in 1953 of the double helix, the twisted-ladder structure of deoxyribonucleic acid (DNA), by James Watson and Francis Crick marked a milestone in the history of science.
Explanation:
Biological macromolecule
A large, organic molecule such as carbohydrates, lipids, proteins, and nucleic acids.
The kid is jumped and beat up from some bullies at school, he may be afraid that they will beat him again worse if he tells on them. <span>Fear of retribution.</span>
Answer:
Having HIV/AIDS weakens your body's immune system. It destroys the white blood cells that fight infection. This puts you at risk for opportunistic infections (OIs). OIs are serious infections that take advantage of your weak immune system.
Explanation:
Considering the multiple choice;
A. Require the correct external signal to replace
B. Start to develop new receptors in adaptation to their new environment.
C. Differentiate non-randomly only when specific hormones are present.
D. develop receptors in a random fashion.
Answer;
A. Require the correct external signal to replace
If only the deterministic hypothesis is correct, undifferentiated stem cells isolated from bone marrow and grown in vitro will
Embryonic stem cells (ESCs) are stem cells derived from the undifferentiated inner mass cells of a human embryo.
Embryonic stem cells are pluripotent, meaning they are able to grow, into all derivatives of the three primary germ layers: ectoderm, endoderm and mesoderm.