Answer:
Crossing the hygienic queen with hygienic drones.
Explanation:
For producing hygienic workers (females) in the F2 generation, the hygienic queen must be cross with hygienic drones. Due to this crossing most of the offspring produced will be hygienic due to presence of dominant allele of hygienic. Both the male and the female bees have dominant allele of hygienic so the maximum number of offspring produced will be of hygienic and very low number of offspring is produced having unhygienic allele.
<em>Radioactive tracers are useful in </em><em><u>determining medical problems.</u></em>
Answer: <em>B. Determining medical problems.</em>
Explanation:
Radioactive tracers are comprised of carrier particles that are reinforced firmly to a radioactive atom. These bearer particles shift incredibly relying upon the motivation behind the scan.
A few tracers utilize atoms that associate with a particular protein or sugar in the body and can even utilize the patient's very own cells.
Examples of radioactive tracer are - tritium, carbon-11, carbon-14 and oxygen-15 and so forth. Radioactive tracers are either injected in the body intravenously or orally.
Answer:
Forelimb protraction starts with a rapid flexion of the shoulder joint bringing the humerus close to its maximum cranial rotation angle, almost in parallel to the mid-sagittal plane. This position has already been reached by the middle of the swing phase.
Answer:
B. An increase in gene flow between the bird populations.
Explanation:
