Which of the following is true in the angiosperm life cycle?
a. Gametophytes originate within and are dependent upon sporophytes.
b. Sporophytes originate within and are dependent upon gametophytes.
c. Both gametophytes and sporophytes are totally independent from each other and are
equally dominant.
d. Gametophytes are free-living and photosynthetic, but are replaced by a dominant
sporophyte generation.
e. Gametophytes are photosynthetic and partially independent from the sporophytes.
A
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What characteristic of vertebrates is missing in all invertebrates?
What will be an ideal response?
If mutagenizing a number of Drosophila results in several observable phenotypes but also in several lethal mutations, does this mean that recessive lethal mutations cannot be studied further?
A) No—the lethal allele can be recovered from heterozygous siblings. B) No—the lethal allele can be sequenced from the other embryos. C) Yes—lethal alleles can be studied only if they are recessive. D) Yes—lethal alleles can be studied only if they are conditional. E) Yes—unless the lethal allele can be supplemented with a missing gene product.
The ________ is a group of cells that will develop into the chorion
Fill in the blank(s) with correct word
Outline a procedure for creating a "knockout" microbe.
What will be an ideal response?