The endosperm of a plant ____.
A. is the food supply for the new sporophyte plant
B. is composed of haploid tissue
C. protects the young embryo within a seed
D. provides a connection between the ovary of a flower and a developing seed
E. produces sperm cells
Answer: A
You might also like to view...
Two principal organelles in eukaryotes that were apparently derived from different types of bacteria are the
A. microfilaments and microtubules. B. mitochondria and chloroplasts. C. rough ER and smooth ER. D. plasma membrane and nuclear membrane.
Humans and chimps look and behave differently due to differences in ________ rather than in genome sequence.
A) gene expression B) genetic mutation C) phenotypes D) mtDNA
The ________ are prokaryotes that resemble bacteria in size and cell division but are more similar to eukaryotes in DNA replication, transcription, RNA processing, and protein synthesis
Fill in the blank with correct word.
Some protozoans have special organelles called contractile vacuoles that continually eliminate excess water from the cell. The presence of these organelles tells you that the environment ________
A) is isotonic to the protozoan B) is hypotonic to the protozoan C) is hypertonic to the protozoan D) contains a higher concentration of solutes than the protozoan