All of the following are characteristic of algae EXCEPTGroup of answer choicesmost are photoautotrophs.they are classified as plants.they may be unicellular or multicellular.they mostly live in aquatic habitats.some produce harmful toxins.

Which of the following are the characteristic features of  green algae? (a)Plant body is undifferentiated and thalloid.(b) Eukaryotic cells with Chlorophyll a & b and pectocellulosic walls(c)Chloroplasts may be discoid, plate-like, reticulate, cup-shaped, spiral or ribbon-shaped in different species.(d) Zygote is the only diploid structure that represents sporophytic stage.

All algae that do not belong to the Cyanophyta are:a) Unicellularb) Eukaryoticc) Symbiontsd) Monophyletic

In which of the following habitats do algae live?a) In terrestrial, marine and freshwater environmentsb) Only in the seac) Only in rivers, lakes and oceansd) Only in rivers and lakes32. Brown algal characteristics: which statement is not true?a) The brown colour of brown algae is caused by chlorophyll cb) The blade of kelps is used for support of the whole algac) The blade of the kelps is used for photosynthesis, nutrient uptakeand photosynthesisd) Kelps reproduce by sexual and asexual reproduction PTO633. Which of the following statements is true?a) All algae are photosynthetic and parasiticb) Algae are either photosynthetic, heterotrophic or parasiticc) Algae are either heterotrophic or parasiticd) There are no parasitic algae34. The most recent common ancestor of all land plants was probably similarto modern-day members of which group?a) Green algaeb) Red algaec) Charophytesd) Brown algae35. All algae that do not belong to the Cyanophyta are:a) Unicellularb) Eukaryoticc) Symbiontsd) Monophyletic36. Which of the following statements about chlorophyll is correct?a) Chlorophyll molecules make up the electron transport chains inphotosynthesis.b) Chlorophyll molecules are found in the chloroplast stroma.c) Chlorophyll molecules appear green because they reflect light in thered and blue ranges.d) Chlorophyll molecules are the photosynthetic pigments in thethylakoid membrane.37. Which of the following statements about the mechanism of the light-dependent reactions of photosynthesis is correct?a) Electrons from photosystem I reduce NADPH.b) Electrons from photosystem I reduce pheophytin.c) Electrons from NADPH revert photosystem II back to the ground state.d) Ferredoxin-NADP reductase reduces NADP+ to NADPH.38. Within the roots of many vascular plants, Casparian strips are present inthe:a) Cortexb) Epidermisc) Steled) Endodermis39. Which of the following statements about chlorophyll is correct?a) Chlorophyll molecules make up the electron transport chains inphotosynthesis.b) Chlorophyll molecules are found in the chloroplast stroma.c) Chlorophyll molecules appear green because they reflect light in thered and blue ranges.d) Chlorophyll molecules are the photosynthetic pigments in thethylakoid membrane.PTO740. The epidermis secretes a waxy coating called the __________________,which keeps water inside the leaf.a) Cortexb) Cambiumc) Epidermisd) Cuticle41. Different leaf shapes have different purposes. What is the purpose forbroad, flat green surfaces?a) Reduce water lossb) Trapping insectsc) To keep predators awayd) Collecting sunlight42. Why is Agrobacterium a useful organism for biologists?a) It causes plant disease.b) It allows plants to resist disease.c) It can be used to make transgenic plants.d) It contains genes which produce chemotherapy agents.43. One major advantage of using Arabidopsis thaliana as a model systemfor studies of plant form and function is itsa) Large genome.b) Large seeds.c) Fast generation time.d) Resistance to abiotic stress.44. Why was a single base pair-change in the qSH1 gene important for thedomestication of rice?a) it increased the plant’s branching patternb) It prevented shatteringc) it reduced toxins that prevented the uptake of nutrients in the graind) it prevented the plant from inbreeding45. What is an ecosystem?a) All the interacting organisms that live in an environment and theabiotic parts of the environment that affect the organismsb) A person who observes and studies the interactions between thebiotic and abiotic parts of the environmentc) The relationship between all the abiotic elements of a forestd) The relationship between all the biotic elements of a forest

Which of the following can photosynthesise?A:Plants, algae and some bacteriaB:Only algaeC:Only plantsD:Just plants and algae

Which of the following is a unicellular algae?(a)Volvox(b)Laminaria(c)Gracilaria(d)Chlorella112. Fucoxanthin is the major pigment in(a) Brown algae(b) Red algae(c) Blue green algae(d) Green algae113. Life cycle ofFucus andSalvinia respectively are(a) Diplontic, Haplontic(b) Haplontic, Diplontic(c) Haplodiplontic, Diplontic(d) Diplontic, Haplodiplontic114. Presence of which of the following characteristics does not aid in reducing the water loss in conifers?(a) Needle-like leaves(b) Thick cuticle(c) Branched stem(d) Sunken stomata