Which organelle contains digestive enzymes that degrade a variety of macromolecules?

A) chloroplast
B) endoplasmic reticulum
C) lysosome
D) mitochondrion


C

Biology & Microbiology

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Which of the following structures attaches muscle to the bone?

A. joints B. sarcomere C. adipose tissue D. ligaments E. tendons

Biology & Microbiology

Speciation often occurs when a habitat becomes more heterogeneous. In Lake Victoria different species of cichlids are found in different areas of the lake. The best explanation for this speciation is that

A) natural selection favored different heritable variations in different parts of the lake. B) male cichlids that lived in deep water needed to be seen by females, so they became colorful. C) food was scarce in the lake, so some fish had to learn how to scrape algae, some had to learn to eat insects, and some had to learn to bite leaves. D) humans selected for many different traits in cichlids in order to market them to the aquarium trade.

Biology & Microbiology

Why can a skin test be used to detect an infection associated with the lungs as in the case of TB?

A. Skin is a type of epithelial tissue, just like lung tissue. B. TB exposure can also occur on the skin. C. Memory T cells and B cells are present throughout the immune system. D. All of the answer options are correct.

Biology & Microbiology

Using single-cell RNA sequencing a clinician can now determine ________ in one experiment instead of two?

A) heterozygosity B) gene expression and protein levels associated with those genes C) ratio of genes present to the expression levels of those genes D) whether the organism is transgenic or not

Biology & Microbiology