Four of the following are characteristic of morphogens. Which one is the exception?
a. They are long-range signals in pattern formation.
b. They are encoded by master genes.
c. They affect gene splicing.
d. Their concentration decreases with distance from source.
e. They affect development.
ANSWER: c
You might also like to view...
If an adult man and woman, both weighing 160 pounds, were stranded on a desert island with
no food, which individual would survive the longest on their body stores?
a. the man b. the woman c. impossible to tell d. There would be no difference because they have the same body mass
Cnidarians have an outer layer derived from ectoderm, an inner layer from endoderm, and a ____
a. middle layer of mesoderm b. watery middle layer c. well-developed brain d. jellylike matrix in between e. complete gut
What connective tissue component is unique to cartilage?
a. matrix hardened by calcium and phosphorus b. extracellular matrix c. fibroblasts d. elastin e. rubbery, compression-resistant glycoproteins
All non-African humans today show evidence of a limited amount of past interbreeding with ________
A) Denisovans B) Paranthropus boisei C) Homo ergaster D) Neandertals E) Australopithecus sediba