Many species can reproduce either asexually or sexually. Explain what you think might be the evolutionary significance of the switch from asexual to sexual reproduction that occurs in some organisms when the environment becomes unfavorable.

Suppose that you found a species S. ambivala that is closely related to S. latifolia, such that they share the same Y chromosome marker. However, S. ambivala is hermaphroditic. What would you expect to see on your gel, if you had taken twenty randomly chosen S. ambivala plants, and performed the same experiment?

What are some unique complications that can arise during specific life stages in organisms, and how do these complications impact their overall survival and reproductive success?

The number of chromosomes present in eukaryotic cells a. is consistent during the life cycle b. is haploid among asexually reproducing forms and diploid if the reproduce sexually c. is double by fertilization and cut in half by meiosis d. is dependent on the age of the tissue

Which statement about meiosis (in humans) is FALSE?   Select one: a. It reduces the amount of genetic material (chromosomes) by half b. It is part of the process of sexual reproduction c. The cells it produces are identical to each other d. It produces haploid gametes e. It occurs only in germline cells of the reproductive organs

If a variety of seaweed reproduces only through mitosis, this would be considered is "asexual reproduction" true or false?

The difference between asexual and sexual reproduction is that A. asexual reproduction occurs only in haplontic organisms, whereas sexual reproduction occurs only in diplontic organisms. B. asexual reproduction results from meiosis, whereas sexual reproduction results from mitosis. C. asexual reproduction occurs only in bacteria, whereas sexual reproduction occurs in plants and animals. O D. asexual reproduction results from the fusion of two gametes, whereas sexual reproduction produces clones of the parent organism. O E. asexual reproduction results in an organism that is identical to the parent, whereas sexual reproduction results in an organism that is not identical to either parent.

The term heterozygous means; a) An organism has two different sex chromosomes Ob) An organism was originally twins that fused together in the zygote stage c) An organism has two identical alleles for a given gene d) An organism has two different alleles for a given gene

GLUT4 is a protein channel that facilitates the transport of glucose into the cell. Under nor- mal conditions, some of the GLUT4 proteins that are synthesized by the cell do not become active and are instead stored within the membranes of vesicles. The insulin receptor tyrosine kinase (TRK) is a receptor protein that facilitates the decrease of glucose concentration in the bloodstream by increasing the uptake of glucose by cells. When the insulin hormone binds the insulin TRK receptor, a signal transduction pathway causes the activation and addition of GLUT4 to the cell membrane. A model of this signal transduction pathway is illustrated in the figure below. insulin insulin receptor cytoplasm A model of the insulin TRK receptor signal-transduction pathway. Which of the following best predicts the effect of a loss of function of the insulin TRK2 A B C D The stimulation of the signal transduction pathway will increase. The storage of GLUT4 inside the cell will increase. The concentration…

If red vizcacha rats (Tympanoctomys barrerae) have 100 autosomes and 2 sex chromosomes in each of their diploid somatic cells, then they must have: only 102 chromosomes in their haploid germ cells only 100 chromosomes in their haploid germ cells only 52 chromosomes in their haploid germ cells only 51 chromosomes in their haploid germ cells only 50 chromosomes in their haploid germ cells