Answer:
Teenager's circadian rhythms – the cycle of sleep and wakefulness – typically begin two hours after adults. Neuroscientists say they are biologically predisposed to go to sleep around midnight and not feel fully awake and engaged until between 9am and 10am
Explanation:
Answer:
Evaporation
Explanation:
The panting responses observed in overheated birds and mammals dissipate excess heat by evaporation
Answer:
GgRr
Explanation:
as it was stated in the question that one of the parent is a heterozygote for both alleles, It could only be written as GgRr. A cross between this parent and the double recessive parent would also give rise to the following listed genotypes, assuming the second Gr/gr in the question to be gr/gr. thus, we would have:
GgRr x ggrr
GR Gr gR gr
gr GR/gr Gr/gr gR/gr gr/gr
Answer:
The nuclear membrane dissolves, and spindle fibers form.
Explanation:
This occurs during prophase. the chromosomes become shorter and thicker. The centrioles migrate to the opposite poles. The nuclear envelope is broken down, the nucleolus disappears, and microtubules attach to the chromosomes at the kinetochores present in the centromere. Microtubules that are associated with the alignment and separation of chromosomes are referred to as spindle fibers. Chromosomes visible under a microscope are connected at the centromere. In meiosis, the homologous chromosomes break in their DNA strands at the same point, following a recombination of the fragmented parental DNA strands into non-parental combinations, known as crossing over.
Answer:
The radicle is the first structure to emerge