What is a biological membrane's structure and functions are determined by what?
What will be an ideal response?
Ans: chemical properties of its constituents: lipids, proteins, and carbohydrates.
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What is the primary reason that fungi are important in the carbon cycle?
A. Fungi are able to reach incredibly large sizes, storing carbon while they are alive, and contributing carbon back to the atmosphere when they die and decompose. B. Fungi are able to reach incredibly large sizes. Their high ratio of surface area to volume allows them to decompose large amounts of dead/decaying material, thereby returning carbon to the atmosphere. C. Fungi are able to reach incredibly large sizes. They have a high ratio of surface area to volume and are able to fix more carbon through photosynthesis than other plants of comparable size. D. Fungi are able to reach incredibly large sizes. Their high ratio of surface area to volume allows them to store more carbon (in the form of sugar) obtained through mycorrhizal associations than their symbiotic hosts.
Why have gene families evolved? Choose the most accurate answer for gene families in general
A) Although in some cases researchers have inferred that gene families are adaptive, gene families may also evolve due to genetic drift. B) Having multiple copies of a gene can increase transcription and translation of the gene, so when increased transcription is adaptive, then natural selection favors genes duplicating into gene families. C) Gene families are adaptive because each gene can produce a slightly different protein, which allows for diverse functions that are favored by natural selection. D) Gene families evolve because of the activity of mobile genetic elements, which cause repeated gene duplication events.
What is the main difference between leukemias and lymphomas?
A) In leukemias, malignant cells are mainly located in the tissues. B) Lymphomas are present mainly in peripheral blood. C) Lymphomas arise due to a lack of response to stimulating antigens. D) Lymphomas arise mainly in lymph nodes, the spleen, or other lymphoid tissue.
Which of the following cell cycles is represented by birds?
A) Alternation of generations B) Haploid life cycle C) Diploid life cycle