What happens to sperm when they enter neck of fern archaegonium?

Q: The rhynchocoel is a ________. a. circulatory system b. fluid-filled cavity c. primitive excretory…

A: Step 1 The phylum Nemertea, also termed as ribbon worms are unique due to the presence of a…

Q: In planarians ampulation : What does the regeneration process like for heads/tails/trunks? Do they…

A: The stem cells can identify which part to replace or generate that they get molecular signs from…

Q: Compare the differences in sexual reproduction between Porifera and Cubozoans. How does the…

A: The important evolutionary step which happened with respect to the phylum cnidaria was the…

Q: Tapeworms posses both male and female reproductive organs. What is the name given to such organism?…

A: Sex is the combining and mixing of Chromosomes during the formation of offspring.

Q: Draw a plant of Rhynia. Be certain to include the reproductive parts. Now assume that it has a life…

A: Rhynia plant is differentiated into horizontally creeping rhizome and an upright branched shoot…

Q: Give short note on cycadospida.

A: The gymnosperms are a group of seed-producing plants, which produce seeds that are not contained…

Q: E- Ammonoidea 1-Shell: 2-Aperture: 3- Suture: 4- Position of siphuncle: 5-Umbilicus: 6-Periphery:…

A: Ammonoidea and Nautiloidea are fossil cephalopods.

Q: Oligochaetes and leeches: have a cuticle that is molted. possess parapodia possess a clitellum…

A: INTRODUCTION Oligochaete  is a subclass comes under phylum Annelida and it consists of earthworms.…

Q: Two embryonic germ layers are characteristic of Porifera and Cnidaria. O True O False

A: The embryonic development is characterized by the formation if primary layers of cells, which are…

Q: sea star How does a sea star protect its tube feet?

A: Seastar:   Seastar is also known as starfish. It belongs to class Asteroidean and it is star shape…

Q: The sponge choanoderm is derived from endoderm. O True False

A: The germ layers are ectoderm, mesoderm and endoderm. this three germ layers are responsible for the…

Q: Water vascular system is the characteristic of which group of the following:(a) Porifera (b)…

A: Echinoderms are the major group of animals included in the kingdom Animalia. This phylum includes…

Q: What is the relationship between snails and Elodea? How does the color of phenol red demonstrate…

A: Question : 3  Answer : Relationship between snail and Elodea :  Snail breathe easily, while elodea…

Q: reproduce sexually in a dry environment. Explain

A: Sexual reproduction is a process in which meiosis occurs where haploid gametes are formed. These…

Q: Describe the function of the clitellum and cocoon

A: Annelids are classified on the basis of their characters, morphology, anatomy, and most importantly…

Q: Choose the best below :In bryophytes, sperm usually move from the antheridium to thearchegonium bya.…

A: Answer is a.) swimming.

Q: true/false 1. Siphonaptera has a laterally flattened body. 2. Sawflies have crochets on their…

A: The answers is given below

Q: Name the structure in moss capsule that is haploid tissue.

A: Mosses are no-vascular plants that produce spores for reproduction instead of seeds. They do not…

Q: Why is it accurate to say that Ulva is truly multicellularbut Caulerpa is not?

A: Ulva and Cauleipa are both, green algae. Green algae possess grass-green chloroplasts. They are…

Q: What influences the distribution of pillbugs?

A: Kingdom Animalia is a diverse group. The organisms of this group inhabit a range of habitats.…

Q: Is the possession of flagellated sperm a primitive or advanced characteristic in the plant kingdom?…

A: A primitive characteristic in the plant kingdom is the possession of flagellated sperm. It is found…

Q: Describe organization of megaspore & development of female gametophyte in Selaginella.

A: Selaginella are member of Division Lycophyta. They occur in varied places like moist, shaded, humid…

Q: Archegonium is an example of female gametangium in plants, which produce motile egg cell.

A: Ans- False Explanation- Archegonium is the female reproductive organ occurs in ferns, mosses and in…

Q: What is the purpose of the bud in Phylum Cnidaria (the Hydra

A: Cnidarians are diploblastic, with structured tissue, eat extracellularly, and use cnidocytes to…

Q: Match the following: Earthworms v [ Choose ] Bivalvia Polychaeta Hirudinea Fixed number of segments,…

A: ▪︎ Annelids with definite number of segments belongs to the class hirudinea . ▪︎Parapodia are…

Q: Why are insects hard to control?

A: A pest is defined as an organism, plant, insect, or animal capable of interfering with human…

Q: How many spinelets of blue sea star crown each paxillae?

A: Sea star also known as star fish belongs to the kingdom Animalia. They are star shaped and are…

Q: The echinoderm blood vascular (hemal) system is involved in gas transport O nutrient transport…

A: The echinoderm blood vascular (hemal) system is invoved in gas transport and nutrient transport.

Q: In which structure are sperm produced and stored in the Monilophyta? sporangia archegonia antheridia

A: Monilophytes are the vascular plants or ferns.

Q: What does a milkweed bugs mouth look like

A:

Q: Sponge tissue layer indicated by the bracket is the A. pinacoderm B. mesohyl C. choanoderm D.…

A: Sponges belong to the phylum Porifera. These animals are the most primitive type. These are mostly…

Q: Is this a male or female? (Agathis philippinensis - axis of old cone)

A: Agathis philippinensis (also known as Almaciga or Dayungon) is a species of Agathis  native to the…

Q: Explain about The Megasporangium (Ovule).

A: A sporangium is the capsule structure that belongs to many plants and fungi, in which the…

Q: The dominant organism in fern is the ________. a. sperm b. spore c. gamete d. sporophyte

A: Step 1 Pteridophytes are primitive seedless vascular plants which possess conspicuous sporophytic…

Q: Why are Gastropoda considered in some cases to cause economic harm, why ?

A: The gastropods are commonly known as snails and slugs, they belong to a large taxonomic class of…

Q: Corals are very temperature sensitive. What is the range of the temperatures between which the…

A: Corals are marine invertebrates within the class anthozoa of the phylum Cnidaria. They typically…

Q: Fern Prothallus Describe the process of fertilization in ferns

A: Ferns are like conifers and flowering plants that are leafy vascular plants. They also have veins in…

Q: Gonozoids continue the reproductive cycle by budding medusae. About how many maturing medusae are…

A: These are rare in number and only found around the hydrocaulus's base. The gonozooids are the…

Q: [ZOOLOGY] 1. a. What is the support structure of millipedes? b. How many trunks do millipedes…

A: Millipedes resemble like insects and they are grouped under arthropods. They are well know for their…

Q: D. Describe why we consider the Heterophyids the most invasive parasites among the trematodes.

A: Answer---

Q: What is the mot distal part of a crinoid that is associated with feeding? A. brachige B. Pinnules C.…

A: Crinoids are marine animals belonging to the phylum Echinodermata and the class Crinoidea.

Q: What is the food needed by mango plants/trees? How do they obtain their food? How do they perform…

A: Mango is the autotrophic photosynthetic plant. A mango tree requires high-nitrogen fertilizer…

Q: What is the other name of megasporangiate strobili? What you will find in this?

A: Strobili are the structure in which the sporangia are found in aggregate form. It is found in…

Q: r vascular system found in echinoderms is primarily involved in;

A: The water vascular system found in Echinoderms is primarily involved in; Answer: Movement

Q: How is fecundation done in insects (external or internal)? Is there copulation between insects?

A: Fecundation, also known as fertilization involves the physical union of the male and female gamete…

Q: Most wrasses are sequential hermaphrodites. What do you think is an adaptive advantage of this…

A: Step 1 Sequential hermaphroditism or dichogamy is a type of hermaphroditism occurring in many fish,…

Q: What part do Balanus use to maintain its position in its natural environment? a. Podia b. Suckers…

A: Balanus It refers to the genus of barnacles which belongs to Balanidae family. Their bodies are…

Q: Fertilisation in moss occurs when sperms swim from a .. and down the neck of a Options O…

A: Introduction: Mosses refer to a phylum of non-vascular plants. Together with liverworts, they are…

Q: What are the club shaped male sex organs in mosses called?

A: Mosses belong to the class of Bryophytes. They are known as the 'Amphibians of the Plant Kingdom' as…