Why did Mendel perform reciprocal crosses?
A) To obtain enough plants to perform the experiments that Mendel wanted.
B) To test a hypothesis that stated the ovum carries all the information for progeny.
C) To be able to breed plants year round.
D) To determine whether the inheritance of a trait depends on which parent carries the trait.
D) To determine whether the inheritance of a trait depends on which parent carries the trait.
You might also like to view...
Prokaryotes consist of ________.
A. organisms belonging all to the same domain, bacteria B. organisms belonging to three different domains, bacteria, archaea, and protists C. organisms belonging to eukaryotes D. organisms belonging to two different domains, bacteria and archaea
Put the steps of the process of signal transduction in the order they occur:
1. A conformational change in the signal-receptor complex activates an enzyme. 2. Protein kinases are activated. 3. A signal molecule binds to a receptor. 4. Target proteins are phosphorylated. 5. Second messenger molecules are released. A) 1, 2, 3, 4, 5 B) 3, 1, 2, 4, 5 C) 3, 1, 5, 2, 4 D) 1, 2, 5, 3, 4
Many proto-oncogenes encode ____
a. growth inhibiting factors b. intracellular receptors
c. tumor suppressor proteins d. receptors for growth inhibiting factors e. growth factors
Why is it INCORRECT to assume that mass extinctions carry only negative impact on the evolution of life on Earth?
A) Mass extinctions are sometimes followed by periods of evolutionary change when other organism groups can flourish and expand in diversity and size. B) Mass extinctions enable scientists to better study embryonic development in two species of organisms and therefore identify possible homology. C) Mass extinctions enable scientists to better study paedomorphosis. D) Mass extinctions disprove Darwin's theory of evolution.